Product Description The Full Calf Helix calf compression sleeve provides comfortable and uniform compression of your lower leg and is a must-have for any competitive athlete. It is also an excellent choice for prevention of injuries and re-injuries, warming your muscles to increase blood flow and limiting muscle oscillation to delay the onset of muscle fatigue, ensuring you can play at your best and leave it all out there. When it’s all over, the Full Calf Helix is the perfect calf compression sleeve for, keeping your muscles warm while your body works to flush out waste products from muscle exertion, ensuring that you will have the best shot at performing at your highest level the following day. Ideal For: Calf strains Shin splints Prevention of re-injury Achilles tendinitis Highlights: Locks to your skin, so it won't slip Uniform, medical-grade compression No bulky straps and buckles Machine wash and dry Closed-cell foam core that won't absorb odor and bacteria Specs: 3 mm thick 20-30 mmHg compression level Closed cell synthetic rubber core High-stretch fabric inside and outside layer Latex free Six-thread flatlock seam Proper fit is important Please see sizing chart in product pics above Which size should I order if I am in between sizes? In general, leaner athletes prefer the smaller size. All others prefer the larger size.