Leatt MTB SocksLeatt&';s mountain bike socks are 3D-knitted with COOLMAXA(R) yarn that pulls sweat away from the skin and pushes it to the outer face of the fabric where it evaporates fast, so your feet stay cool and dry on long climbs and hot bike-park laps. The ankle, heel and instep are reinforced for durability and a little extra protection where pedals and rocks tend to find you.Two styles on this page: MTB - 6" cuff, everyday trail sock. Reinforced ankle, heel and instep, super-soft knitted top. MTB Endurance - 7" cuff, longer sock with a left/right-specific knit for XC, gravel and all-day pedaling. Features 3D-knitted construction with reinforced ankle, heel and instep sections COOLMAXA(R) moisture-wicking yarn Super-soft knitted top band MTB: 6" cuff height A Endurance: 7" cuff height, left/right-specific fit Plastic-free, recyclable packaging Sizing S/M - US 5.5-8.5 / EU 38-42 / UK 5-8 L/XL - US 9-13 / EU 43-48 / UK 8.5-12.5