Technical wet-wading socks for use with Simms FlyweightA(R) Wet Wading Shoe. Built-in gravel guard sheds water, gravel and muck Silicone print grip inside gravel guard to help keep it in place Reinforced lace hook keeps guard from lifting in strong currents Mid-calf height Machine wash & dry. See garment label for details. FABRIC TECH: 2.5mm Airprene Underfoot; 2.5mm Neospan Upper Sizes: S (7-8), M (8-10), L (10-12), XL (12-13), 2XL (13-14)ITEM #: PG-13150