Fabric type Outer:61% high nylon,32% polyester,7% elastane; Interlayer: high performance lightweight function of and breathable membrane; Lining: 66% coolmax ,30% polyester,4% elastane..Care instructions Machine Wash. .Fit type Stretch.. Socks with a Three-Layer Construction might be A Little Coolmax to stuff into some shoes. Please match with Loose Fit Shoes. Each pair of our socks is packed in individual delicate draw string bag, holiday and birthday gifts for family,lover and friends who like outdoor activities.. &BREATHABLE: Our socks handily solve the contradiction between ing and breathing property. nylon makes our socks more durable and sturdier. and breathable membrane effectively let moisture not penetrat into our lining area and creating a breathability for our socks. inner has a good moisture conductivity,rapidly wicking perspiration away from our skins and ing a Cool and soft feeling to our feet..PERFORMANCE: Padded heel,toe and footbed amazing shock absorption and guard against pressure and friction. Elastic cuff would never strangle your feet and efficiently lets your socks not slid into your boots and shoes. The Y-heel can completely cover the heel,providing extra and comfort for our feet. Smooth seamless toe avoids yarn chaffing and irritation,reducing abrasion and eliminating blisters on the toes..OCCASIONS: Our winter socks are blister resistant,wind& water resistant,highly breathable,wildly used in hiking,skiing,trekking,rocky climbing,cycling,fishing,hunting,wading,football and other outdoor activities. Due to the good function,our socks are also a good choice for those who have wounds on their feet and cannot touch water. The cuff of socks is not , please don't let water over the top of the socks..WASHING INSTRUCTION: When these socks are machine washed,the water temperature should be below 40℃/ 104℉ and while hand washed,the water should under normal temperature. Do not iron or dry clean. Tumble dry is feasible within 60℃/ 140℉. No distortion or color fading after multiple washings.