RECOMMENDED FOR: Everyday activities including walking, running, hiking, biking and sports. Improve your performance and recovery quickly with the best fitting compression socks on the market. FIRM COMPRESSION: Stabilizes muscles to help energize your step and recover quickly. Reduces fatigue, minimizes swelling, and soothes sore, achy feet. COMFORT FEATURES: Accu-fit Technology, Turn Welt Top, Arch Support, Breather Panel, Seamless Toe Closure, Compression Construction, Ultra Light Cushion Sole HIGH PERFORMANCE YARNS: Provides natural moisture management, odor control, thermoregulation and durability. SIZES: Small/Medium fits women's US shoe size 4 – 7.5, Size Medium/Large fits US shoe size 8 – 11.