Technical wet-wading socks for use with Simms Flyweight® 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