Storm Bloc Mens Calderbeck Socks Black/Blue The Storm Bloc Mens Calderbeck Socks are the ideal long leg socks for use with long boots. The Storm Bloc socks are BlueGuard Long Cotton that has been engineered from high strength anti-abrasion durability yarn to create the best wear and abrasion resistance rating possible, while maintaining all the comfort and protection features you expect from an outdoor sock. The Calderbeck Socks have been made with protective, shock-absorbing terry cushioning panels to minimise fatigue, woven arch supports, an extended heel and a reinforced toe seam. Scientifically tested over 30x more durable than a standard branded walking sock. Fabric and care: 40% Polyester, 27% Polyamide, 25% Wool, 6% Polypropylene, 2%Lycra Elastane Lifetime Guarantee