Compression arch support for superior fit and comfortTrail specific cushion at heel, toe, and shinRib knit upper won't slide down when the trail gets roughFlat-stitch toe construction offers improved comfort68% wool, 24% polyamide nylon, 6% polyester, 2% elastane High-cushion mountain bike socks The Defend Winter Socks keep your feet comfortable and warm on the most demanding winter rides. Made from wool and featuring trail-specific cushion at the heel, toe, and shin, you'll be able to ride longer, more comfortably down the gnarliest of trails in these socks. The compression arch and flat-toe construction kicks up comfort even further while providing a snug and superior fit, while the rib knit upper means these socks will stay up for the whole ride.