●100% Waterproof Technology — Our waterproof socks have technical 3-layer reinforced construction-Nylon, Spandex & 40% Copper Fiber combined with membrane that stops water from entering while staying breathable for maximum comfort. These socks are specially crafted with high-density activated copper fiber that is woven into polyester yarns for premium functional performance. ●Advanced & Innovative Functionality Design: These hiking socks are not only weatherproof, but theyre also practical function waterproof socks. Our advanced technology and innovative WATERPROOF LINE MARK design ensure that maximum convenience when you use it. Copper fibers deliver natural odor management so your feet feel fresh even when youre working up a sweat in summer. ●Perfect for Outdoor Activities: Trekking, camping, hiking, backpacking, biking, fishing, hunting and exploring. Perfect for many kinds of water sports: skating, surfing, skiing and kayaking. Waterproof outdoor socks are the best partner for your wonderful outdoor adventures. ●Size: Small (US Men: 4-6, US Women: 5-7), Medium (US Men: 6.5-9, US Women: 7.5-10), Large (US Men: 9.5-12, US Women: 10.5-13). Refer to the size chart for more information. ●WASH & CARE: Machine Wash and the water temperature should be below 30°C/ 86°F; Hand washes under normal temperature. Do not tumble dry. Do not iron or dry clean. Please note that the cuff of socks have waterproof line mark, above the waterproof line mark is not waterproof for more breathable and better elastic wrapping when wearing, so dont let water over the line mark. ●MATERIAL: Outer - 95% nylon, 5% lycra. Interlayer - waterproof and breathable membrane(a high-performance function waterproof membrane). Lining - 40% Copper Fiber infused yarn, 60% Modal.