Performance Targeted Compression Calf Socks Built for extra reps and high mileage, these Calf Socks deliver focused support where it matters most. A stronger elastic and tighter knit through the ankle provide targeted compression to help reduce fatigue and keep you feeling fresh. Our Stay-Up Tech keeps them locked in place, while a Merino Wool blend in the heel, arch, and toe offers additional comfort—so you can stay on your feet and in your rhythm. Features Stay-Up Technology All calf and knee-high socks are engineered with Stay-Up Technology: the perfect tension and elasticity to keep them exactly where you want them. Tight, but not too tight. Honeycomb Arch Support Our Honeycomb Support System cradles the arch of your foot, like a firm but comfortable hug around your midfoot. Mesh Ventilation A specialized knitting technique allows for more airflow in key areas. Left-Right Engineered Designed to fit each foot precisely for a more ergonomic fit. Sport Cushioning Strategically cushioned in the areas athletes need it most. Seamless Toe Our Seamless Toe is linked with a special knit stitch that eliminates the annoying bump that runs across the toes of most socks. You won't feel a thing. Full Fabric Content 54% polyester 17% merino wool 16% nylon 7% elastane 6% cotton Imported Care Details Machine wash cold on gentle cycle, Do not bleach, Tumble dry low, Do not Iron, Do not dryclean