Sealskinz 100 waterproof mid weight mid length socks have an anatomically designed fit with a water shunning hydrophilic membrane outer and a softer merino wool pile lining for warmth and moisture controlhand linked toes for smooth seams reduce abrasion and irritation while elastication in the cuffs instep and achilles ankle panel provide support these thermal lined socks are especially suited to static lower energy activities such as fishing0815