{"product":{"catalog_id":"126e1663-0b5c-447d-8150-ca08751ed8e4","is_eligible_search":true,"is_eligible_checkout":false,"item_id":"fa4788a0-fe6c-4ffc-b0b6-767b139a0c40","title":"Black Classic Briefs Recycled Polyester 3-Pack","description":"3-pack of Calvin Klein black classic briefs for men, crafted from recycled polyester microfibre with enhanced stretch to ensure maximum freedom of movement and shape retention. Features include moisture-wicking technology, a double-layered front panel, and an elastic waistband with repeating Calvin Klein branding. 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Maybe briefs are the popular choice for style of underwear for men my age, but these are definitely worth a try, especially if you are finding your underwear isn't as supportive as you might like.","reviewer_name":"Cameron"},{"date":"January 21, 2026","tags":["Sizing & Fit","Fabric","Comfort"],"title":"Great fit and material","rating":5,"content":"Fits well and love the microfiber material","reviewer_name":"Clarence L."},{"date":"November 4, 2021","title":"La coupe n'était pas bonne","rating":2,"content":"La coupe n'était pas bonne","reviewer_name":"Daniel"},{"date":"November 6, 2023","tags":["Sizing & Fit","Fabric","Comfort","Color","Quality","Value"],"title":"Perfect fit and top quality","rating":5,"content":"Perfect fit and top quality","reviewer_name":"Peter M."},{"date":"January 22, 2023","title":"slip","rating":5,"content":"comme une deuxieme peau","reviewer_name":"Fernand 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significantly more — an 88% polyester brief dries drastically faster, making it a practical option for gym sessions, travel, or hot days when you need to wash and wear the next morning."},"entry_quotes":{"shape_retention_after_washing":[{"url":"https://fexwear.com/why-88-polyester-12-spandex-running-apparel-dominates-the-performance-market-the-wholesale-buyers-technical-deep-dive/","quote":"Our lab tests prove 12% spandex delivers optimal “recoil velocity”—measured at 94% elastic recovery after 1,000 stretch cycles."}],"quick_drying_microfiber_construction":[{"url":"https://www.brownthomas.com/men/clothing/underwear-socks/three-pack-microfiber-stretch-boxer-briefs/2001267149.html","quote":"Microfiber stretch, quick-drying, moisture-wicking"}]},"entry_sources":{"shape_retention_after_washing":["https://fexwear.com/why-88-polyester-12-spandex-running-apparel-dominates-the-performance-market-the-wholesale-buyers-technical-deep-dive/"],"quick_drying_microfiber_construction":["https://www.brownthomas.com/men/clothing/underwear-socks/three-pack-microfiber-stretch-boxer-briefs/2001267149.html"]}},"stretch_and_shape_retention":{"title":"Stretch and shape retention over time","entries":{"12_elastane_vs_5_benchmark":"At 12% elastane, these briefs deliver over double the elastic fiber content of the 5% spandex benchmark used in standard cotton briefs, comfortably exceeding the 3% threshold at which underwear begins to sag — meaning they are engineered to resist permanent bagging far longer.","heat_and_elasticity_longevity":"Elastane suffers permanent degradation above 60°C (140°F) — the polymer backbones break down rather than shrinking — so a cold-wash, low-heat-dry routine preserves the 12% elastane’s ability to snap back to shape, extending the life of the briefs’ supportive fit far beyond what a standard hot laundry cycle would allow.","polyester_s_moisture_resistance":"The 88% recycled polyester body does not absorb water the way natural fibers do, so it resists the moisture-driven relaxation that causes cotton briefs to loosen and stretch out when damp — the result is a fit that stays consistent even through a sweaty day.","moisture_wicking_as_elasticity_protector":"The built-in moisture-wicking technology pulls perspiration off the skin and speeds drying, minimizing the time salts and acids from sweat remain in contact with elastane — chemicals known to attack the polymer chains and gradually weaken elastic recovery."},"entry_quotes":{"12_elastane_vs_5_benchmark":[{"url":"https://xiaotex.com/en/blog/elasticity-equation","quote":"Below 3% spandex, underwear bags and sags by noon."},{"url":"https://xiaotex.com/en/blog/elasticity-equation","quote":"5% spandex (elastane) is the underwear industry's benchmark"}],"heat_and_elasticity_longevity":[{"url":"https://textiletuts.com/does-spandex-shrink/","quote":"When exposed to temperatures above 60°C (140°F), spandex does not shrink — it degrades."}],"polyester_s_moisture_resistance":[{"url":"https://mfgmerch.com/fabric-stretches-out-of-shape/","quote":"Unlike cotton or rayon, they resist moisture-related stretching"}],"moisture_wicking_as_elasticity_protector":[{"url":"https://modaknits.com/why-do-some-activewear-fabrics-lose-elasticity-over-time/","quote":"Sweat contains salts and acids that weaken elastane fibers when repeatedly absorbed into fabrics."}]},"entry_sources":{"12_elastane_vs_5_benchmark":["https://xiaotex.com/en/blog/elasticity-equation"],"heat_and_elasticity_longevity":["https://textiletuts.com/does-spandex-shrink/"],"polyester_s_moisture_resistance":["https://mfgmerch.com/fabric-stretches-out-of-shape/"],"moisture_wicking_as_elasticity_protector":["https://modaknits.com/why-do-some-activewear-fabrics-lose-elasticity-over-time/"]}}}},"handle":"black-classic-briefs-recycled-polyester-3-pack-3694-321110","storefront_path":"/en/men-underwear/boxers-briefs/performance-underwear/black-classic-briefs-recycled-polyester-3-pack--3694-321110","storefront_url":"https://ai.simons.ca/en/men-underwear/boxers-briefs/performance-underwear/black-classic-briefs-recycled-polyester-3-pack--3694-321110"}}