SLS3 Women's True Graduated Butterfly Compression, Performance, Training, Race, Recovery Socks (1 pair) INCREASE BLOOD CIRCULATION: 20-30 mmHG of graduated compression, designed by medical professionals. REDUCED INJURIES- Quicker recovery time and increased performance. One Sock for everything: Training, Racing, Recovery. SEAMLESS: no seam on the toe box - more comfortable and blister protection. MUSCLE STABILITY: reduce muscle vibration drastically, which leads to less soft tissue damage and less sore muscles. SUPERIOR MATERIALS: 76 percent Micro Nylon, 24 percent Spandex. Sizing chart in pictures to the left 20-30 mmHG of true graduated compression for increased blood circulationm, muscle oxygenation and stability Maximal removal of metabolic waste products ensure faster recovery and less post exercise muscle soreness Decreased muscle vibration increases endurance, strength and power 60% Polypropylene, 32% Nylon, 8% Spandex; Wash cold, No Bleach, Line Dry