EMFRAA Mens Womens Compression Under Cool Base Layer T Shirt Long Sleeve XS ~ XXL Polyester 80% Spandex 20% UVA/UVB protection - emfraa product protects your skin from UVA/UVB radiation during your outdoor workout. When the clothes are wet, it causes the germs to reproduce and unpleasant smell because the air cannot leave from the clothes. It will not smell stink even if you wear for long time due to our functional base layer fabric which controls the air permeability and moisture. Quick dryness - Normal pants absorb sweat quickly but they are not capable of drying sweat which causes the pants to weight more and to feel coldness. However, emfraa compression not only absorbs sweat quickly but also dry it instantaneously. Therefore, it gives you the best fit for your activities. Quick Absorption - In short time, during your exercise, emfraa compression gives you the comfortable fit and, helps your workout. Air permeability - Due to light material, this product provides the best air permeability which helps you to absorbs and dry sweat quickly.- Because of the air permeability, it does not stress out your skin Therefore, emfraa product is the best functional item for your workout. Controlling Body Temperature - During summer workout, it cools down your body temperature and warms up while you are working out in cold weather. The other important function of emfraa product is that It protects from germs and deodorize.