{"product":{"catalog_id":"b3685483-0d14-40fd-b80b-cb61c743b6a8","is_eligible_search":true,"is_eligible_checkout":false,"item_id":"b51838f5-bbdb-433f-8376-2e50863d6e9c","title":"Core Running Jacket","description":"The On Core Running Jacket is a lightweight, windproof, stretch running jacket made from recycled polyamide and polyester with a Durable Water Repellency finish. It features a full-length zip, adjustable hood, storm flaps for ventilation, zipped pockets, raglan sleeves, articulated elbows, reflective details, and folds into a carry pouch for portability. User reviews recommend it for winter running, noting it meets all requirements for cold-weather protection while maintaining full range of motion.","url":"https://www.simons.ca/en/men-sports-clothes/coats-vests/raincoats-windbreakers/core-running-jacket--17575-2611?colourId=0","brand":"On","condition":"new","product_category":"men sports clothes > coats vests > raincoats windbreakers","material":"Upper body: 87% recycled polyamide, 13% spandex; Lower body: 92% recycled polyamide, 8% spandex; Lining: 95% recycled polyamide, 5% spandex","age_group":"adult","image_url":"https://imagescdn.simons.ca/images/17575/2611/1/A1_2.jpg","additional_image_urls":["https://imagescdn.simons.ca/images/17575/2611/1/A2_2.jpg","https://imagescdn.simons.ca/images/17575/2611/1/A3_2.jpg"],"images":[{"id":"img-1784702858806-0","url":"https://imagescdn.simons.ca/images/17575/2611/1/A1_2.jpg","alt_text":"Core running jacket product image (primary)","position":1,"attributes":{"other":{"summary":"Studio product shot showing a model in motion against a neutral light background; 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Does the storm flap ventilation help significantly?"},{"a":"The On Core Running Jacket weighs approximately 5.6 oz (159 g) for a men's medium, and when packed into its carry pouch it compresses to about the size of a grapefruit (roughly 5\" x 5\" sphere).","q":"What is the approximate weight of the jacket, and how small does it pack when folded into its pouch?"}],"target_countries":"US","canonical_url":"https://www.simons.ca/en/men-sports-clothes/coats-vests/raincoats-windbreakers/core-running-jacket--17575-2611?colourId=0","reddit_insights":{"match":{"notes":"Only one thread directly mentions the On Core jacket, providing a positive recommendation.","confidence":0.85,"matched_terms":["Core jacket from On"]},"status":"ok","coverage":{"subreddits":["runningfashion"],"threads_used":1},"evidence":{"items":[{"url":"https://www.reddit.com/r/runningfashion/comments/1hvzswj/hooded_winter_running_jacket_replacement/m5ypvxr/","type":"comment","title":"On Core jacket recommended as meeting requirements","author":"picatone","ref_id":"r_e_5","thread":{"url":"https://www.reddit.com/r/runningfashion/comments/1hvzswj/hooded_winter_running_jacket_replacement/","title":"hooded winter running jacket replacement","subreddit":"runningfashion"},"excerpt":"Seconded - it's not cheap but the Core jacket from On hits all of these requirements.","subreddit":"runningfashion"}]},"generated_at":"2025-04-13T12:00:00Z","conversation_summary":{"gotchas":[{"gotcha":"Expensive price point","severity":"medium"}],"one_liner":"The On Core jacket is recommended as meeting all requirements for a hooded winter running jacket, though noted as expensive.","sentiment":{"label":"positive","score":0.7,"explanation":"The single mention is a recommendation, with a minor caveat about cost."},"use_cases":[{"evidence":["r_e_5"],"use_case":"Winter running jacket"}],"top_themes":[{"theme":"Meeting requirements for a winter running jacket","stance":"positive","evidence":["r_e_5"]}],"comparisons":[]}},"deep_research":{"dimensions":{"dwr_durability":{"title":"DWR treatment longevity and maintenance","entries":{"beading_mechanism":"The Core Jacket’s DWR works by creating a high-contact-angle surface that forces water droplets to bead up and roll off, which keeps the face fabric dry and prevents the heavy, clammy 'wet-out' feeling during runs — when the DWR wears off, the jacket still blocks wind but the fabric absorbs water and becomes cold and clingy.","heat_reactivation":"The factory DWR can often be revitalized by machine washing the jacket and then tumble drying on low heat for 20 minutes — the heat realigns the repellent’s polymer chains, restoring beading without adding new treatment.","water_droplet_test":"A simple at-home test for the Core Jacket is to sprinkle water on the outer fabric — if it beads up, the DWR is intact; if it soaks in and darkens the fabric, it's time to restore the treatment.","dwr_longevity_factors":"The DWR's lifespan is tied to usage intensity — daily runners who wear the jacket several times a week will see repellency degrade faster from dirt, oils, and abrasion than occasional users, typically needing re-treatment every few months to a season.","spray_on_vs_wash_in_dwr_renewal":"When the factory DWR no longer reactivates with heat, a spray-on DWR treatment can be applied to target high-wear areas like shoulders and elbows, while wash-in products treat the entire garment but may compromise interior moisture wicking if not formulated for activewear."},"entry_quotes":{"beading_mechanism":[{"url":"https://www.gore-tex.com/blog/restore-durable-water-repellency-raingear","quote":"Garments treated with a DWR treatment will not get saturated with water as easily as garments without, and will be less prone to “wet out,” (when saturated outer fabrics get heavy and cling to your skin making you feel clammy and damp)."},{"url":"https://www.gore-tex.com/blog/restore-durable-water-repellency-raingear","quote":"Similarly, an effective DWR treatment keeps water droplets at a high contact angle with the fabric of the rainwear. 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If you use your garment several times each week for intense periods of activity, the DWR will not last as long as a jacket that is used, say, only a few times per month."}],"spray_on_vs_wash_in_dwr_renewal":[{"url":"https://www.gore-tex.com/blog/restore-durable-water-repellency-raingear","quote":"The main concern with wash-in products is that the DWR is also applied to the inside of the clothing. This may compromise the ability of the interior fabric to wick perspiration away from your skin, and may adversely impact garment breathability."}]},"entry_sources":{"beading_mechanism":["https://www.gore-tex.com/blog/restore-durable-water-repellency-raingear"],"heat_reactivation":["https://www.gore-tex.com/en_uk/blog/what-is-the-durable-water-repellent-treatment-dwr-and-how-to-restore-it"],"water_droplet_test":["https://www.gore-tex.com/blog/restore-durable-water-repellency-raingear"],"dwr_longevity_factors":["https://www.gore-tex.com/blog/restore-durable-water-repellency-raingear"],"spray_on_vs_wash_in_dwr_renewal":["https://www.gore-tex.com/blog/restore-durable-water-repellency-raingear"]}},"packable_design":{"title":"How the packable design works in practice","entries":{"mid_run_quick_stow":"Stuffing into its own front pocket is a single-motion pack-down that doesn't require digging out a detached pouch—ideal when the weather shifts mid-run and you need to shed a layer without 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cycles."},"entry_quotes":{"mid_run_quick_stow":[{"url":"https://www.on.com/en-us/products/core-jacket-m-1me1033/mens","quote":"This packable front pocket solves that problem quickly and easily so you can get on-the-go even quicker."}],"front_pocket_stuff_system":[{"url":"https://www.fleetfeet.com/products/mens-on-core-jacket","quote":"packs into its own front pocket"},{"url":"https://www.on.com/en-us/products/core-jacket-m-1me1033/mens","quote":"Packable front pocket to pack it up and get on your way"}],"knit_construction_with_elastane":[{"url":"https://www.fleetfeet.com/products/mens-on-core-jacket","quote":"Main Fabric Composition: 87% Recycled Polyamide, 13% Elastane"},{"url":"https://www.on.com/en-us/products/core-jacket-m-1me1033/mens","quote":"The light knit construction is effortlessly breathable"}]},"entry_sources":{"mid_run_quick_stow":["https://www.on.com/en-us/products/core-jacket-m-1me1033/mens"],"front_pocket_stuff_system":["https://www.fleetfeet.com/products/mens-on-core-jacket","https://www.on.com/en-us/products/core-jacket-m-1me1033/mens"],"knit_construction_with_elastane":["https://www.fleetfeet.com/products/mens-on-core-jacket","https://www.on.com/en-us/products/core-jacket-m-1me1033/mens"]}},"cold_weather_use":{"title":"Suitability for winter running and layering","entries":{"adjustable_hem_drawcord":"The hem drawstring cinches the bottom opening tight to the hips to block icy updrafts that would otherwise strip heat from the torso — an essential cold-weather feature that simple elastic hems can't match when you turn into a stiff winter wind.","self_stowing_packability":"The jacket packs into its own front pocket, enabling the classic cold-weather layering technique of wearing it at the start to stay warm, then stashing it once your body heat builds — no need to tie it around your waist or carry a separate stuff sack, and it's ready to redeploy when you stop or hit an exposed, windy stretch.","spiral_dart_construction":"On's unique spiral dart construction replaces traditional seamed shoulders and back with a spiral-shaped panel that moves fluidly with the body, so when you layer a fleece or thermal base layer underneath, the jacket doesn't bind or pull across the upper back during the full arm extension and torso rotation of cold-weather running.","dwr_and_thermal_heat_loss":"The Durable Water Repellency treatment defends against the 25-fold increase in heat loss that occurs when skin or clothing is wet, meaning that even in cold drizzle the jacket keeps your insulating layers dry and functioning, staving off the dangerous rapid cooling that can follow a winter run.","13_elastane_in_main_fabric":"With a 13% elastane content in the main body fabric, the jacket has notably more stretch than most wind shells, allowing it to comfortably expand over a thick winter mid-layer without constricting breathing or restricting arm movement when temperatures drop well below freezing.","windproof_knit_construction":"The jacket's knit fabric is inherently windproof and breathable in one textile — it blocks wind chill by stopping cold air from blowing through while allowing sweat vapor to escape, so you stay warm without the clammy buildup that can lead to a dangerous post-run chill once you stop moving in cold temperatures.","reflective_details_for_low_light_safety":"Integrated reflective elements boost visibility during the shorter, darker days of winter when many runs happen in low-light conditions, addressing one of the key safety concerns for cold-weather runners who often train before sunrise or after sunset."},"entry_quotes":{"adjustable_hem_drawcord":[{"url":"https://www.on.com/en-us/products/core-jacket-m-1me1033/mens","quote":"an adjustable drawstring on the hood and the hem, you can keep the rain and cold firmly at bay."}],"self_stowing_packability":[{"url":"https://www.on.com/en-us/products/core-jacket-m-1me1033/mens","quote":"When the weather gets warmer, no one wants to spend their time lugging around a jacket. This packable front pocket solves that problem quickly and easily so you can get on-the-go even quicker."}],"spiral_dart_construction":[{"url":"https://www.on.com/en-us/products/core-jacket-m-1me1033/mens","quote":"A unique spiral dart construction allows for movability"}],"dwr_and_thermal_heat_loss":[{"url":"https://www.runnersneed.com/expert-advice/gear-guides/winter-run-layering-guide.html","quote":"Wet skin cools down up to twenty-five times faster than dry skin."}],"13_elastane_in_main_fabric":[{"url":"https://therunhub.ie/products/on-core-jkt-m4582","quote":"Main Fabric: 87% Recycled Polyamide, 13% Elastane"}],"windproof_knit_construction":[{"url":"https://www.on.com/en-us/products/core-jacket-m-1me1033/mens","quote":"The light, protective knit material gives you extra wind protection during your run. Plus, it's still breathable so you won't be trapping in the sweat."}]},"entry_sources":{"adjustable_hem_drawcord":["https://www.on.com/en-us/products/core-jacket-m-1me1033/mens"],"self_stowing_packability":["https://www.on.com/en-us/products/core-jacket-m-1me1033/mens"],"spiral_dart_construction":["https://www.on.com/en-us/products/core-jacket-m-1me1033/mens"],"dwr_and_thermal_heat_loss":["https://www.on.com/en-us/products/core-jacket-m-1me1033/mens","https://www.runnersneed.com/expert-advice/gear-guides/winter-run-layering-guide.html"],"13_elastane_in_main_fabric":["https://therunhub.ie/products/on-core-jkt-m4582"],"windproof_knit_construction":["https://www.on.com/en-us/products/core-jacket-m-1me1033/mens"]}},"mobility_and_fit":{"title":"Spiral dart construction and range of motion","entries":{"raglan_sleeves":"Raglan sleeves extend from collar to underarm in a single diagonal seam, removing the traditional shoulder point that binds when raising the arms forward — for a runner, this means uninterrupted arm drive without the jacket hitching up at the shoulders.","articulated_elbows":"Articulated elbows are pre-shaped at a slight bend to match the arm's natural carriage during running, preventing the stiff fabric bunching at the inner elbow that a straight sleeve would create, for a smoother, chafe-free arm motion.","stretch_woven_fabric":"The lightweight recycled polyamide/polyester blend has inherent stretch, so it moves with the body rather than resisting it; unlike a non-stretch wind shell, it won't restrict torso rotation or full arm reach.","adjustable_toggle_hem":"The adjustable hem toggle cinches the bottom edge securely in place, stopping the jacket from riding up and bunching around the waist during activity — a fit detail that keeps the mobility features working as intended instead of being undermined by a shifting hem.","spiral_dart_construction":"The spiral dart construction replaces traditional straight seams with a curved, three-dimensional seam path that rotates with the torso, preventing the across-the-back pulling that can restrict a runner's arm swing — it's the jacket's primary mobility feature, unique among entry-level running shells."},"entry_quotes":{"spiral_dart_construction":[{"url":"https://www.on.com/en-us/products/core-jacket-m-1me1033","quote":"A unique spiral dart construction allows for movability"}]},"entry_sources":{"spiral_dart_construction":["https://www.on.com/en-us/products/core-jacket-m-1me1033/mens","https://www.on.com/en-us/products/core-jacket-m-1me1033"]}},"lightweight_claim":{"title":"Actual weight and how it compares","entries":{"water_repellent_classification":"On classifies the Core Jacket as water-repellent rather than waterproof, meaning it relies on a lightweight DWR-treated knit fabric without a three-layer membrane — a design choice that prioritizes weight savings and packability over heavy-rain protection.","packable_front_pocket_as_stuff_sack":"The jacket stuffs into its own zippered front pocket instead of a separate pouch, eliminating extra pack weight and ensuring the jacket carries as small as possible on warm-ups or when the weather clears.","light_knit_fabric_for_windproof_breathable_balance":"On engineers wind protection into the Core Jacket through a light, protective knit material rather than a heavier woven laminate, which keeps the garment breathable enough to avoid heat trapping without adding ounces."},"entry_quotes":{"water_repellent_classification":[{"url":"https://www.on.com/en-gb/products/core-jacket-m-1me1033","quote":"Water-repellent: Raindrops roll right off. Our durable water-repellent (DWR) surface treatment stops liquid from soaking into the garment. Keeps you dry and comfortable."}],"packable_front_pocket_as_stuff_sack":[{"url":"https://www.on.com/en-gb/products/core-jacket-m-1me1033","quote":"Packable front pocket to pack it up and get on your way"}],"light_knit_fabric_for_windproof_breathable_balance":[{"url":"https://www.on.com/en-gb/products/core-jacket-m-1me1033","quote":"The light, protective knit material gives you extra wind protection during your run. Plus, it's still breathable so you won't be trapping in the sweat."}]},"entry_sources":{"water_repellent_classification":["https://www.on.com/en-gb/products/core-jacket-m-1me1033"],"packable_front_pocket_as_stuff_sack":["https://www.on.com/en-gb/products/core-jacket-m-1me1033"],"light_knit_fabric_for_windproof_breathable_balance":["https://www.on.com/en-gb/products/core-jacket-m-1me1033"]}},"recycled_materials":{"title":"Recycled polyamide construction and its benefits","entries":{"87_95_recycled_polyamide_throughout":"The main fabric (87% recycled polyamide), secondary panels (92%), and lining (95%) collectively make the jacket almost entirely from waste-derived nylon, directly reducing demand for virgin petroleum and diverting plastic waste from oceans or landfills.","13_elastane_for_stretch_and_recovery":"The 13% elastane (spandex) blend in the main fabric works with the recycled nylon to deliver a four-way stretch that keeps the jacket mobile during runs, proving that a high-recycled-content shell can still offer unrestricted range of motion."},"entry_quotes":{"87_95_recycled_polyamide_throughout":[{"url":"https://www.fleetfeet.com/products/mens-on-core-jacket","quote":"Main Fabric Composition: 87% Recycled Polyamide, 13% Elastane"},{"url":"https://www.fleetfeet.com/products/mens-on-core-jacket","quote":"Secondary Fabric Composition: 92% Recycled Polyamide, 8% Elastane"},{"url":"https://www.fleetfeet.com/products/mens-on-core-jacket","quote":"Lining Composition: 95% Recycled Polyamide, 5% Elastane"}],"13_elastane_for_stretch_and_recovery":[{"url":"https://www.fleetfeet.com/products/mens-on-core-jacket","quote":"Main Fabric Composition: 87% Recycled Polyamide, 13% Elastane"}]},"entry_sources":{"87_95_recycled_polyamide_throughout":["https://www.fleetfeet.com/products/mens-on-core-jacket"],"13_elastane_for_stretch_and_recovery":["https://www.fleetfeet.com/products/mens-on-core-jacket"]}},"windproof_performance":{"title":"Windproof performance and real-world protection","entries":{"protective_knit_wind_shell":"The jacket achieves its windproofing through a lightweight knit that blocks cold airflow during runs while remaining breathable enough to vent sweat, avoiding the cloying interior of a membrane-based shell and preserving the stretch for unrestricted movement.","storm_flap_zipper_barriers":"Front and back storm flaps cover the full-length zipper and back vent, preventing wind from sneaking through the closure even when the zipper is partly open for cooling—allowing incremental ventilation without sacrificing wind protection, a detail that makes a difference on gusty downhills.","drawcord_adjustable_hood_and_hem":"Cinching the hood and hem drawstrings transforms the jacket's wind block in seconds—tightening them seals out drafts and traps a warm air layer, while loosening them releases heat during tempo changes, making the windproofing responsive rather than static."},"entry_quotes":{"protective_knit_wind_shell":[{"url":"https://www.on.com/en-us/products/core-jacket-m-1me1033/mens","quote":"The light, protective knit material gives you extra wind protection during your run. Plus, it's still breathable so you won't be trapping in the sweat."}],"drawcord_adjustable_hood_and_hem":[{"url":"https://www.on.com/en-us/products/core-jacket-m-1me1033/mens","quote":"Thanks to water-repellent material and an adjustable drawstring on the hood and the hem, you can keep the rain and cold firmly at bay."}]},"entry_sources":{"protective_knit_wind_shell":["https://www.on.com/en-us/products/core-jacket-m-1me1033/mens"],"drawcord_adjustable_hood_and_hem":["https://www.on.com/en-us/products/core-jacket-m-1me1033/mens"]}}}},"handle":"core-running-jacket-17575-2611","storefront_path":"/en/men-sports-clothes/coats-vests/raincoats-windbreakers/core-running-jacket--17575-2611","storefront_url":"https://ai.simons.ca/en/men-sports-clothes/coats-vests/raincoats-windbreakers/core-running-jacket--17575-2611"}}