Three-layer membrane construction waterproof sock ensures protection and minimal bulk for any activity in wet, rainy conditions. HEIGHT: Over-the-calf height (15") for additional waterproof protection. CONSTRUCTION: Three-layer construction, securely bonded throughout entire sock. LINER: HANZ wicking liner for moisture management. MEMBRANE: HANZ stretchable waterproof, breathable MVT membrane. SHELL: Nylon/Lycra Spandex offering a durable, flexible, stretch covering.