74% Merino Wool, 20% Nylon, 6% Lycra Spandex Made in Canada ALL SEASON HIKING & OUTDOOR SOCKS: J.B. Field's 74% Merino Wool Hiker GX is an all season sock that is meant for outdoor activities such as backpacking, hiking, Trekking and camping. It’s made of a breathable material so your feet feel comfortable regardless the weather. SOFT & ITCH FREE - Merino wool is a type of wool that comes from a merino sheep. It is the finest wool on the market, making the fabric soft and itch-free. Merino is one of the best fibres for wicking moisture as it can absorb up to 30% of its weight in moisture and moves it from your skin to the outside of the fabric, where it evaporates. It contains 74% Merino Wool, 20% Nylon, 6% Lycra Spandex FULL COMFORT & PROTECTION - Ankle & Arch Support- Arch Support, Double Cuff and Contoured Half Cushion for superior fit, comfort and protection. Impact Support Zones (which are strategically reinforced zones) add superior comfort and protection. WICKING AWAY MOISTURE - As a versatile fiber, we only use the finest quality of easy-care wool in our socks. Wool is breathable and excellent at regulating body temperature by keeping your feet dry and wicking away moisture. VARIOUS SIZE OPTIONS - Small - (1-4 Men & 2-5 Women), Medium (Women's 7-10 Shoe / Men's 6-9 Shoe), Large (Men's 8-13 Shoe / Women's 9 -13 Shoe), X-Large (Men's 14-16 Shoe) The Hiker GX is an all-season, multi-purpose Merino hiking sock for outdoor activities. Exceptional value is coupled with unique features in this sock. Arch support, half-cushion padding, and impact support zones ensure these hiking socks will outlast the competition.