SCIENTIFICALLY PROVEN: Countless Articles Have Demonstrated How Using Compression During and After Physical Activity can Dramatically Increase Performance, and Reduce Muscle Pain, Swelling, and Soreness. Leg Sleeves are A MUST HAVE for Running, Cycling, Cross Fit, Basketball, Soccer, Volleyball, or any Leg Intensive Fitness Activity, NOT JUST FOR ATHLETES: Many of Our Customers Have Used These Compression Stockings to Naturally Treat (and help with symptoms of) Varicose Veins, Plantar Fasciitis, Extensor Tendonitis, Ankle Swelling, and other Conditions. Also Common for AIR TRAVEL, Especially for Those with Deep Vein Thrombosis (DVT) or Otherwise Prone to Blood Clots, Optimum For Any Stage of The Exercise Cycle: PRE EXERCISE > Improves Circulation for Faster Warm Up; DURING EXERCISE> Reduces Muscle Fatigue and Damage> Heightens Agility; Improves Performance. POST EXERCISE > Faster Recovery > Decrease Soreness, TWO COMPRESSION LEVEL OPTIONS: Thirty48 Compression Leg Sleeves are Available in 15-22 mmHg or 20-30 mmHg. Colors Black/Red and Blue are 20-30 mmHg for those who Need a Higher Level of Compression.