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. Design: A soft, protective cushion at the heel that prevents chafing and blisters from shoe contact Each individual sock is ergonomically designed to fit either your right foot or left foot perfectly, so both are extremely comfortable Bombas Seamless Toe is linked with a special knit stitch that eliminates the annoying bump that runs across the toes of most socks The Y-Stitched Heel creates a natural cup around your heel made to fit your feet Strategic zone cushioning only where you need it most, with a thinner leg and foot than our full cushion Our Honeycomb Support System cradles the arch of your foot, like a firm but comfortable hug around your midfoot Technology Temperature regulating vents allow cool air to flow in, which helps manage moisture and prevent overheating where you need it most Hex Tec performance breathability and moisture-wicking to keep you dry, cushioned and comfortable Additional Details One pair purchased = One pair donated