{"product_id":"os1st-ta4-thin-air-performance-socks","title":"OS1st TA4 Thin Air Performance Socks","description":"\u003cp\u003e\u003cstrong\u003eBuilt for warm weather, hard efforts, and feet that run hot, the TA4 Thin Air Performance Sock is a breathability-first design — ultra-light knit, ventilated channels, and a smooth interior that feels almost weightless inside the shoe.\u003c\/strong\u003e\u003c\/p\u003e\u003ch3\u003eBest Used For\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSummer running, hiking, and outdoor training\u003c\/li\u003e\n\u003cli\u003eWarm-weather travel and long days in heat\u003c\/li\u003e\n\u003cli\u003eGym sessions and court sports where feet run hot\u003c\/li\u003e\n\u003cli\u003eAnyone who finds traditional socks too warm during activity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eVentilated air channels designed to release heat through the sock\u003c\/li\u003e\n\u003cli\u003eUltra-light construction for a barely-there feel inside the shoe\u003c\/li\u003e\n\u003cli\u003eLight compression for stability during dynamic movement\u003c\/li\u003e\n\u003cli\u003eMoisture-wicking yarns engineered to keep feet dry under load\u003c\/li\u003e\n\u003cli\u003eSeamless construction to help limit rubbing during long efforts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSize And Fit\u003c\/h3\u003e\u003cp\u003eThe TA4 is sized S through XL and sold one pair per box. Sizing follows shoe size — match the chart below to your everyday footwear.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSizes: S, M, L, XL\u003c\/li\u003e\n\u003cli\u003eMove Light Collection colours: Light Beam, Ultraviolet, Blue Shift, Green Burst\u003c\/li\u003e\n\u003cli\u003eCore colours: Black, White, Grey, Aqua, Steel Blue, Lavender, Pink\u003c\/li\u003e\n\u003cli\u003eOne pair per box\u003c\/li\u003e\n\u003cli\u003e85% Nylon, 15% LYCRA Spandex\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0636\/9725\/6660\/files\/Thin-Air-Size-Chart.webp?v=1778786329\" alt=\"OS1st TA4 Thin Air Performance Socks Size Chart\" loading=\"lazy\" width=\"900\" style=\"max-width: 100%; height: auto;\"\u003e\u003c\/p\u003e\u003ch3\u003eCare Instructions\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMachine wash cold on gentle cycle\u003c\/li\u003e\n\u003cli\u003eTumble dry on low heat\u003c\/li\u003e\n\u003cli\u003eNo bleach\u003c\/li\u003e\n\u003cli\u003eNo fabric softener\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eShipping And Returns\u003c\/h3\u003e\u003cp\u003eShipped from Medibrace Canada with Canadian checkout and bilingual customer support. Compression and bracing products are fit-sensitive, so we recommend reviewing the size chart before ordering for the best feel.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eAre they durable enough for daily running?\u003c\/strong\u003e Yes. The knit is light, but the high-stress areas (heel, toe, ball of foot) are reinforced for repetitive movement.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow does the ventilation actually work?\u003c\/strong\u003e Open mesh channels are knit into the top of the sock, which lets heat and moisture escape while the structured zones hold the sock in place.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre they sold as a pair?\u003c\/strong\u003e Yes, one pair per box.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill they keep my feet warm in cold weather?\u003c\/strong\u003e No — the TA4 is intentionally cool. For colder conditions, the FS4 Merino Wool sock is a better choice.\u003c\/p\u003e","brand":"OS1st","offers":[{"title":"S","offer_id":47940540399828,"sku":null,"price":40.99,"currency_code":"CAD","in_stock":false},{"title":"M","offer_id":47940540432596,"sku":null,"price":40.99,"currency_code":"CAD","in_stock":false},{"title":"L","offer_id":47940540465364,"sku":null,"price":40.99,"currency_code":"CAD","in_stock":false},{"title":"XL","offer_id":47940540498132,"sku":null,"price":40.99,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0636\/9725\/6660\/files\/OS1st_Thin-Air-Performance-Socks_NS_black_1.webp?v=1778786318","url":"https:\/\/medibrace.ca\/products\/os1st-ta4-thin-air-performance-socks","provider":"Medibrace Canada","version":"1.0","type":"link"}