DuShow Men's Long Sleeve Cycling Running Fitness Shirt Jersey Top The size is US Size,If you like loose One,Pls choose one size up than usual wear Imported 82% Polyester-18% Spandex-Dual fabric Mesh design, Anti-microbial deodorization fabric for odor control Non abrasion fabric material with excellent elasticity and durability ,Stretchy and durable material grabs your muscles tightly and improves your performance 3d mesh breathable elastic system on the Armpit and back, Breathable, soft and moisture-wicking fabric keep you dry and comfortable non-slip silicone strip on the lower hem provide stable and fixable situation when you are movement Compression shirts are suitable for high impact training, like weight lifting, battling ropes, training apparel,for boxing, running, jogging or any other outdoor activities,it helps on vapour transportation and keeps the skin cool and dry.will help to stimulate the blood flow and reduce recovery time.