{"product":{"catalog_id":"68799d27-423f-4a79-aee3-0465cf30c636","is_eligible_search":true,"is_eligible_checkout":false,"item_id":"0560cb96-043f-4c36-b2ca-204db2c69a23","title":"Core-T Tee","description":"The Core-T Tee is a lightweight, ultra-breathable short-sleeve crew-neck t-shirt constructed from stretch microfibre jersey with a fully micro-perforated finish. It is intended for athletic and casual wear, featuring a relaxed straight cut, a small white reflective logo on the left chest, and a second white 'on' logo near the lower-right hem on the back. Key specifications include a smooth knit fabric with a subtle sheen, short loose sleeves, and a straight hem with double-stitched seams.","url":"https://www.simons.ca/en/men-sports-clothes/t-shirts-tank-tops/t-shirts/core-t-tee--17575-242001?colourId=1","brand":"On","condition":"new","product_category":"men sports clothes > t shirts tank tops > t shirts","material":"Main fabric: 92% recycled polyester, 8% spandex","age_group":"adult","image_url":"https://imagescdn.simons.ca/images/17575/242001/1/A1_2.jpg","additional_image_urls":["https://imagescdn.simons.ca/images/17575/242001/1/A2_2.jpg"],"images":[{"id":"img-1784702884654-0","url":"https://imagescdn.simons.ca/images/17575/242001/1/A1_2.jpg","alt_text":"Core-T tee product image (primary)","position":1,"attributes":{"other":{"summary":"Studio shot showing a model wearing the tee against a light gray gradient background; even studio lighting with soft shadows; image framed from mid-thigh to above the head, centered composition.","observations":[{"key":"Background","kind":"feature","value":"Neutral light gray gradient backdrop with no visible props.","regions":[{"x":0,"y":0,"width":1,"height":1,"confidence":"high"}],"evidence_status":"direct"},{"key":"Shot composition","kind":"feature","value":"Centered frontal portrait of a standing model cropped from mid-thigh to above the head.","regions":[{"x":0.06,"y":0.04,"width":0.88,"height":0.92,"confidence":"high"}],"evidence_status":"direct"},{"key":"Lighting and shadow","kind":"feature","value":"Even soft studio lighting with minimal harsh shadows and a slight shadow cast to the model's right side.","regions":[{"x":0.3,"y":0.1,"width":0.4,"height":0.8,"confidence":"medium"}],"evidence_status":"direct"}]},"colors":[{"name":"black","part":"main body","regions":[{"x":0.15,"y":0.2,"width":0.7,"height":0.7,"confidence":"high"}],"subject":"product","description":"Solid matte to slightly lustrous black fabric across the torso, sleeves, and neckline.","sampled_hex":"#0E0E0E","estimated_hex":"#0A0A0A"},{"name":"white","part":"chest logo","regions":[{"x":0.52,"y":0.22,"width":0.06,"height":0.09,"confidence":"high"}],"subject":"product","description":"Small solid white printed logo on the left chest.","estimated_hex":"#FFFFFF"}],"product":{"summary":"Front view of a short-sleeve black crew-neck t-shirt worn by a model; 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surface shows faint horizontal texture under close inspection.","regions":[{"x":0.2,"y":0.28,"width":0.6,"height":0.4,"confidence":"medium"}],"evidence_status":"direct"},{"key":"Chest logo","kind":"text","value":"Small white stacked logo composed of a small circle above a lowercase character, placed on the left chest.","regions":[{"x":0.52,"y":0.22,"width":0.06,"height":0.09,"confidence":"high"}],"evidence_status":"direct"},{"key":"Hem","kind":"feature","value":"Straight hem at the bottom of the tee with visible stitch line.","regions":[{"x":0.22,"y":0.78,"width":0.56,"height":0.1,"confidence":"high"}],"evidence_status":"direct"},{"key":"Visible seams","kind":"feature","value":"Seam lines visible at shoulders and sleeve hems, finished with matching thread.","regions":[{"x":0.22,"y":0.18,"width":0.56,"height":0.12,"confidence":"high"}],"evidence_status":"direct"},{"key":"Fit on model","kind":"feature","value":"Tee appears loose through the torso on the model rather than form-fitting.","regions":[{"x":0.28,"y":0.3,"width":0.44,"height":0.45,"confidence":"high"}],"evidence_status":"direct"}]},"packaging":{"observations":[]},"schema_version":2,"coordinate_space":{"units":"normalized","origin":"top_left"}},"variant_ids":["4076419","4076420","4076421","4076422","4472999","4473000","4473001","4473002"]},{"id":"img-1784702884654-1","url":"https://imagescdn.simons.ca/images/17575/242001/1/A2_2.jpg","alt_text":"Core-T tee product image 2","position":2,"attributes":{"other":{"summary":"Studio product shot showing a model from the rear against a plain light gray background with even studio lighting and soft shadows.","observations":[{"key":"Model pose","kind":"feature","value":"Male model standing facing away from the camera with head turned slightly to the right and arms relaxed at sides.","regions":[{"x":0.2,"y":0.04,"width":0.62,"height":0.92,"confidence":"high"}],"evidence_status":"direct"},{"key":"Background and lighting","kind":"feature","value":"Even neutral light gray background with soft, diffused studio lighting and faint shadowing behind the model.","regions":[],"evidence_status":"direct"},{"key":"Image crop","kind":"feature","value":"Full-body crop from upper head to mid-thigh with lower legs out of frame.","regions":[{"x":0.05,"y":0,"width":0.9,"height":0.98,"confidence":"high"}],"evidence_status":"direct"}]},"colors":[{"name":"black","part":"shirt body","regions":[{"x":0.14,"y":0.08,"width":0.72,"height":0.86,"confidence":"high"}],"subject":"product","description":"Solid deep black fabric with a matte finish and slight sheen from studio lighting; appears uniform across the back panel and sleeves.","sampled_hex":"#0D0D0E","estimated_hex":"#0B0B0B"},{"name":"white","part":"lower-right logo","regions":[{"x":0.6,"y":0.78,"width":0.07,"height":0.1,"confidence":"high"}],"subject":"product","description":"Small solid white printed logo contrasting with the black fabric.","estimated_hex":"#FFFFFF"}],"product":{"summary":"Rear view of a black short-sleeve tee worn by a model; plain back panel with a small white brand logo near the lower right hem.","observations":[{"key":"Back panel","kind":"feature","value":"Full back of a short-sleeve tee shown; smooth, slightly draping fabric with faint vertical folds and minimal visible seam lines near shoulders and hem.","regions":[{"x":0.14,"y":0.08,"width":0.72,"height":0.86,"confidence":"high"}],"evidence_status":"direct"},{"key":"Sleeve shape","kind":"feature","value":"Short sleeves with a loose fit ending above the elbow and a visible stitched hem along the sleeve edge.","regions":[{"x":0.14,"y":0.18,"width":0.28,"height":0.2,"confidence":"high"},{"x":0.58,"y":0.18,"width":0.28,"height":0.22,"confidence":"high"}],"evidence_status":"direct"},{"key":"Neckline","kind":"feature","value":"Crew neckline visible from the rear with a narrow stitched collar band.","regions":[{"x":0.38,"y":0.06,"width":0.25,"height":0.08,"confidence":"high"}],"evidence_status":"direct"},{"key":"Lower-right logo","kind":"text","value":"Small white lowercase 'on' logo printed near the lower-right hem on the back of the tee.","regions":[{"x":0.6,"y":0.78,"width":0.07,"height":0.1,"confidence":"high"}],"evidence_status":"direct"},{"key":"Hem","kind":"feature","value":"Straight bottom hem with visible double-stitched seam running across the width of the shirt.","regions":[{"x":0.16,"y":0.8,"width":0.68,"height":0.1,"confidence":"high"}],"evidence_status":"direct"}]},"packaging":{"observations":[]},"schema_version":2,"coordinate_space":{"units":"normalized","origin":"top_left"}},"variant_ids":["4076419","4076420","4076421","4076422","4472999","4473000","4473001","4473002"]}],"price":"80 CAD","sale_price":"80 CAD","availability":"in_stock","listing_has_variations":"true","variants":[{"sku":"4076419","url":"https://www.simons.ca/en/men-sports-clothes/t-shirts-tank-tops/t-shirts/core-t-tee--17575-242001?colourId=1","image":{"id":"img-variant-4076419","url":"https://imagescdn.simons.ca/images/17575/242001/1/A1_2.jpg","alt_text":"Core-T tee - Black - SMALL variant image","position":1,"variant_ids":["4076419"]},"price":{"value":80,"currency":"CAD"},"title":"Core-T Tee - Black - Small","option1":"Black","option2":"SMALL","image_url":"https://imagescdn.simons.ca/images/17575/242001/1/A1_2.jpg","variant_id":"4076419","availability":"in_stock"},{"sku":"4076420","url":"https://www.simons.ca/en/men-sports-clothes/t-shirts-tank-tops/t-shirts/core-t-tee--17575-242001?colourId=1","image":{"id":"img-variant-4076420","url":"https://imagescdn.simons.ca/images/17575/242001/1/A1_2.jpg","alt_text":"Core-T tee - Black - MEDIUM variant image","position":2,"variant_ids":["4076420"]},"price":{"value":80,"currency":"CAD"},"title":"Core-T Tee - Black - Medium","option1":"Black","option2":"MEDIUM","image_url":"https://imagescdn.simons.ca/images/17575/242001/1/A1_2.jpg","variant_id":"4076420","availability":"in_stock"},{"sku":"4076421","url":"https://www.simons.ca/en/men-sports-clothes/t-shirts-tank-tops/t-shirts/core-t-tee--17575-242001?colourId=1","image":{"id":"img-variant-4076421","url":"https://imagescdn.simons.ca/images/17575/242001/1/A1_2.jpg","alt_text":"Core-T tee - Black - LARGE variant image","position":3,"variant_ids":["4076421"]},"price":{"value":80,"currency":"CAD"},"title":"Core-T Tee - Black - Large","option1":"Black","option2":"LARGE","image_url":"https://imagescdn.simons.ca/images/17575/242001/1/A1_2.jpg","variant_id":"4076421","availability":"in_stock"},{"sku":"4076422","url":"https://www.simons.ca/en/men-sports-clothes/t-shirts-tank-tops/t-shirts/core-t-tee--17575-242001?colourId=1","image":{"id":"img-variant-4076422","url":"https://imagescdn.simons.ca/images/17575/242001/1/A1_2.jpg","alt_text":"Core-T tee - Black - X-LARGE variant image","position":4,"variant_ids":["4076422"]},"price":{"value":80,"currency":"CAD"},"title":"Core-T Tee - Black - X-Large","option1":"Black","option2":"X-LARGE","image_url":"https://imagescdn.simons.ca/images/17575/242001/1/A1_2.jpg","variant_id":"4076422","availability":"in_stock"}],"item_group_title":"Core-T Tee","size_system":"US","gender":"male","is_digital":"false","q_and_a":[{"a":"The Core-T Tee has a regular fit based on On's typical sizing for their performance tees. It is not a slim fit, so if you prefer a closer cut, you may want to size down.","q":"How does the Core-T Tee fit compared to typical On sizing? Is it a slim or regular fit?"},{"a":"Yes, the microfibre jersey is designed to wick moisture effectively. It is described as ultra-breathable and features a micro-perforated fabric, which enhances airflow and moisture management during high-intensity workouts.","q":"Does the microfibre jersey wick moisture effectively during high-intensity workouts?"},{"a":"For best care, we recommend machine washing cold with like colors and tumble drying on low. Avoid using fabric softeners, as they can affect moisture-wicking properties. For specific instructions, please refer to the garment's care label.","q":"What are the recommended care instructions for this tee (e.g., machine wash cold, tumble dry low)?"},{"a":"The fabric is soft against the skin. On uses high-quality microfibre jersey that feels smooth and comfortable, not rough or overly synthetic.","q":"Is the fabric soft against the skin or does it have a synthetic feel?"}],"target_countries":"US","canonical_url":"https://www.simons.ca/en/men-sports-clothes/t-shirts-tank-tops/t-shirts/core-t-tee--17575-242001?colourId=1","deep_research":{"dimensions":{"on_tee_lineup_comparison":{"title":"Core-T compared to other On tees","entries":{"fit_and_everyday_cross_over":"Where the Performance-T's close, race-cut fit limits casual wear, the Core-T's regular fit — described by On as 'Classic, comfortable and never clingy, for running, sports or your daily routine' — is built to pull double duty as a run-and-wear everyday tee.","everyday_essential_vs_race_day_specialist":"The Core-T is On's everyday running staple, built with a regular fit and all-over micro-perforation, while the Performance-T comes in at 3.60 oz with a race-ready close fit, bonded seams, and a laser-cut back panel for aggressive heat dumping — a $20 price gap that reflects the shift from versatile daily miles to hot-weather speed-work."},"entry_quotes":{"fit_and_everyday_cross_over":[{"url":"https://www.on.com/en-us/products/core-t-m-1me1043","quote":"Classic, comfortable and never clingy, for running, sports or your daily routine."},{"url":"https://www.outdoorgearlab.com/reviews/clothing-mens/running-shirt-men/on-performance-t-shirt","quote":"The close fit feels race-ready but does not transition well to the gym, errands, or casual wear."}],"everyday_essential_vs_race_day_specialist":[{"url":"https://www.on.com/en-us/products/core-t-m-1me1043","quote":"Go back to basics with this lightweight and versatile tee. Designed for the everyday runner's wardrobe."},{"url":"https://www.outdoorgearlab.com/reviews/clothing-mens/running-shirt-men/on-performance-t-shirt","quote":"The On Performance-T Shirt is the most technically capable running shirt in our lineup. At 3.60 ounces, it is one of the lightest we tested, and the laser-cut ventilation in the back panel delivers breathability that no other shirt here can match."}]},"entry_sources":{"fit_and_everyday_cross_over":["https://www.on.com/en-us/products/core-t-m-1me1043","https://www.outdoorgearlab.com/reviews/clothing-mens/running-shirt-men/on-performance-t-shirt"],"everyday_essential_vs_race_day_specialist":["https://www.on.com/en-us/products/core-t-m-1me1043","https://www.outdoorgearlab.com/reviews/clothing-mens/running-shirt-men/on-performance-t-shirt"]}},"price_to_competitor_value":{"title":"How the Core-T stacks up to competitors","entries":{"recycled_polyester_content":"Built with recycled polyester, the Core-T matches the sustainability promise of the Patagonia Capilene Cool Daily (100% recycled) and the rabbit EZ Tee (94% recycled) while sitting in the same sub-$60 price band — a signal that eco-conscious materials no longer command a premium surcharge in the running shirt segment.","59_99_usd_55_80_cad_price_point":"The Core-T's $59.99 USD price places it squarely between the $50 Patagonia Capilene Cool Daily and the $70 Tracksmith Twilight Tee, while undercutting On's own $80 Performance-T — a sweet spot that buys into the Swiss brand's running aesthetic at a lower entry fee than most of its technical competitors.","regular_fit_vs_trim_technical_fits":"The Core-T's regular, never-clingy fit — described by On as a classic comfortable cut — differs from the body-conforming trim of the Tracksmith Twilight Tee ($70) and many race-oriented tops, offering a more accessible silhouette that doubles as casual wear, a versatility that mirrors the Patagonia Capilene Cool Daily's forgiving drape and helps justify the $60 outlay as an all-day piece rather than workout-only gear."},"entry_quotes":{"recycled_polyester_content":[{"url":"https://www.on.com/en-gb/products/core-t-m-1me1043/mens/black-apparel-1ME10430553","quote":"Made with recycled polyester, this lightweight fabric won't slow you down even an inch."},{"url":"https://www.irunfar.com/best-running-shirts-for-men","quote":"Patagonia employs its recycled polyester jersey material, which is supremely comfortable."},{"url":"https://www.outdoorgearlab.com/best-running-shirt","quote":"Quick n' Fit 94% recycled polyester/6% spandex"}],"59_99_usd_55_80_cad_price_point":[{"url":"https://www.roadrunnersports.com/product/50345/mens-on-coret?cc=021","quote":"Men's On Core-T $59.99"},{"url":"https://www.irunfar.com/best-running-shirts-for-men","quote":"Patagonia Capilene Cool Daily Shirt ($50)"},{"url":"https://www.roadtrailrun.com/2026/07/best-technical-running-shirts-for.html","quote":"Tracksmith Twilight Tee($70)"},{"url":"https://www.outdoorgearlab.com/best-running-shirt","quote":"On Performance-T Shirt $80 List"}],"regular_fit_vs_trim_technical_fits":[{"url":"https://www.on.com/en-gb/products/core-t-m-1me1043/mens/black-apparel-1ME10430553","quote":"Regular: Classic, comfortable and never clingy"},{"url":"https://www.roadrunnersports.com/product/50345/mens-on-coret?cc=021","quote":"Classic Fit: No gimmicks here - straightforward styling that works as a go-to road running tee or an everyday casual layer"},{"url":"https://www.roadtrailrun.com/2026/07/best-technical-running-shirts-for.html","quote":"Made of an Italian-made micro mesh, the Twilight is 85% Polyester / 15% Elastane with a trim close fit but plenty of stretch."}]},"entry_sources":{"recycled_polyester_content":["https://www.on.com/en-gb/products/core-t-m-1me1043/mens/black-apparel-1ME10430553","https://www.irunfar.com/best-running-shirts-for-men","https://www.outdoorgearlab.com/best-running-shirt"],"59_99_usd_55_80_cad_price_point":["https://www.roadrunnersports.com/product/50345/mens-on-coret?cc=021","https://www.irunfar.com/best-running-shirts-for-men","https://www.roadtrailrun.com/2026/07/best-technical-running-shirts-for.html","https://www.outdoorgearlab.com/best-running-shirt"],"regular_fit_vs_trim_technical_fits":["https://www.on.com/en-gb/products/core-t-m-1me1043/mens/black-apparel-1ME10430553","https://www.roadrunnersports.com/product/50345/mens-on-coret?cc=021","https://www.roadtrailrun.com/2026/07/best-technical-running-shirts-for.html"]}},"micro_perforation_benefits":{"title":"How micro-perforations boost airflow","entries":{"vapor_superhighway":"Each micro‑perforation functions as a direct exit for sweat vapor, so the moisture‑wicking jersey dries faster than it could through surface evaporation alone — you stay drier during threshold efforts and avoid that clingy, saturated feel.","weightless_ventilation":"Because the cooling comes from the fabric itself rather than added mesh panels, the tee remains exceptionally lightweight — the micro‑perforated construction saves grams that matter during fast running or racing.","full_body_micro_perforation":"Rather than limiting ventilation to underarm and back panels, the Core‑T perforates the entire jersey, resulting in an even distribution of airflow that avoids the localized dampness common with targeted vent shirts.","thermal_regulation_backed_by_research":"A published ergonomics study demonstrated that small ventilation holes in a T‑shirt can significantly lower both thermal insulation and moisture vapor resistance during movement — for the Core‑T, that translates into a measurable head‑start on staying cool when you pick up the pace."},"entry_quotes":{"vapor_superhighway":[{"url":"https://ugawear.com/how-laser-perforation-is-revolutionizing-activewear/","quote":"When applied to advanced synthetic fabrics (like polyester or nylon blends), perforation acts as a superhighway for moisture vapor. As the fabric wicks sweat to the surface, the perforations dramatically accelerate evaporation, keeping the athlete drier and cooler faster."}],"weightless_ventilation":[{"url":"https://bushisports.com/laser-cut-ventilation-in-performance-sportswear-how-it-works/","quote":"By replacing heavy mesh inserts with laser-cut patterns, garments remain lightweight without compromising performance or durability."}],"thermal_regulation_backed_by_research":[{"url":"https://pubmed.ncbi.nlm.nih.gov/21491282/","quote":"Heat and moisture transmission through the T-shirt can be further enhanced by creating small apertures on the front and back of the T-shirt with specially added fullness."}]},"entry_sources":{"vapor_superhighway":["https://ugawear.com/how-laser-perforation-is-revolutionizing-activewear/"],"weightless_ventilation":["https://bushisports.com/laser-cut-ventilation-in-performance-sportswear-how-it-works/"],"thermal_regulation_backed_by_research":["https://pubmed.ncbi.nlm.nih.gov/21491282/"]}},"microfiber_jersey_properties":{"title":"What stretch microfibre jersey offers","entries":{"microfibre_durability":"Microfibre fabrics are inherently resistant to abrasion because the ultra-fine polyester threads pack densely, reducing fraying and thinning through repeated machine washes — for the Core-T, that means it maintains its smooth finish and color saturation far longer than a typical cotton or non-microfibre active tee.","all_climate_versatility":"On labels the Core-T as 'Any climate' gear and explicitly states it's engineered for all seasons — the microfibre jersey balances breathability and light thermal retention, keeping you cool in summer heat but warm enough under a shell in autumn, effectively covering the full training calendar in one shirt.","controlled_jersey_stretch":"Microfibre jersey knits typically deliver moderate, lasting stretch — the Core-T relies on loop geometry rather than high elastane content to provide give, so it moves freely with lunges, overhead reaches, and sprints yet snaps back to its original shape wash after wash without the progressive sag of elastane-heavy tops.","recycled_polyester_construction":"The Core-T's microfibre jersey is woven from recycled polyester — confirmed on On's own product page — reducing reliance on virgin petroleum, cutting carbon emissions by an estimated 30% versus conventional polyester, and diverting post-consumer plastic from oceans, turning each run into a small sustainability win.","microfibre_moisture_architecture":"With individual fibers measuring less than 10 micrometers — finer than silk — the jersey's enormous internal surface area pulls sweat off the skin and spreads it for rapid evaporation, keeping the shirt perceptibly drier during tempo runs and interval sessions than even standard polyester workout tees."},"entry_quotes":{"microfibre_durability":[{"url":"https://sewport.com/fabrics-directory/microfibre-fabric","quote":"Microfibre is also highly durable, and it is both reasonably absorbent and water-repellant."}],"all_climate_versatility":[{"url":"https://www.on.com/en-gb/products/core-t-m-1me1043/mens/black-apparel-1ME10430553","quote":"Engineered for all seasons, this T keeps you comfortable whether it’s cold, warm, or anything in between. Wear it year-round."}],"controlled_jersey_stretch":[{"url":"https://sewport.com/fabrics-directory/microfibre-fabric","quote":"Stretchability (give) | Medium"}],"recycled_polyester_construction":[{"url":"https://www.on.com/en-gb/products/core-t-m-1me1043/mens/black-apparel-1ME10430553","quote":"Made with recycled polyester, this lightweight fabric won't slow you down even an inch."}],"microfibre_moisture_architecture":[{"url":"https://sewport.com/fabrics-directory/microfibre-fabric","quote":"These fibres generally have diameters measuring less than 10 micrometers and have denier weights under 0.7 D."},{"url":"https://sewport.com/fabrics-directory/microfibre-fabric","quote":"Moisture-wicking abilities | High"}]},"entry_sources":{"microfibre_durability":["https://sewport.com/fabrics-directory/microfibre-fabric"],"all_climate_versatility":["https://www.on.com/en-gb/products/core-t-m-1me1043/mens/black-apparel-1ME10430553"],"controlled_jersey_stretch":["https://sewport.com/fabrics-directory/microfibre-fabric"],"recycled_polyester_construction":["https://www.on.com/en-gb/products/core-t-m-1me1043/mens/black-apparel-1ME10430553"],"microfibre_moisture_architecture":["https://sewport.com/fabrics-directory/microfibre-fabric"]}}}},"handle":"core-t-tee-17575-242001","storefront_path":"/en/men-sports-clothes/t-shirts-tank-tops/t-shirts/core-t-tee--17575-242001","storefront_url":"https://ai.simons.ca/en/men-sports-clothes/t-shirts-tank-tops/t-shirts/core-t-tee--17575-242001"}}