Lightweight, purpose-built socks for running, working out and movement. Bombas Hex Tec construction for breathability and moisture-wicking. Proprietary poly/cotton blend yarns. With comfort innovations like strategic zone cushioning and airflow ventilation. Specially designed to help you move with grace and speed. Fit & Design Hex Tec: performance breathability and moisture-management to keep your feet dry and comfortable Strategic Zone Cushioning: cushioning only where you need it most, with a thinner leg and foot than our full cushion Airflow Venting: temperature regulating vents allow cool air to flow in, which helps manage moisture and prevent sweaty feet Blister Tab: a soft, protective cushion at the heel that prevents chafing and blisters from shoe contact Y-Stitched Heel: creates a natural cup around your heel made to fit your feet Seamless toe closure Honeycomb Arch Support System: cradles the arch of your foot, for a firm but comfortable hug around your midfoot Left-Right Contoured: ergonomically designed to fit either your right foot or left foot perfectly Additional Details: One pair purchased = one pair donated