Peresvit Rash Guard Men Short Sleeve Immortal Silver Force MMA with Ag+ Fabric 80% polyester/ 15% spandex /5% silver yarn Imported 80% polyester; 15% spandex; 5% silver yarn. Breathable fabric balances temperature while eliminating excessive moisture and heat. Silver Force Ag+ yarn offers antibacterial and anti-odor properties, Quick dry technology keeps your body dry and muscles warm, for maximum performance. Silicon elastic band on the inside of the rash guard offers a non-slip grip around the waist, keeping the shirt in place in a wide range of movements; rashguard top shirt Provides protection against scrapes, rashes and cuts Flat lock reinforced triple stitched compression seams for durability under repetitive stress and elastic fabric to avoid chafing and four-way stretch compression second-skin tights fit allows you to wear this shirt under any t-shirt, gi, etc. and provides maximal support for warmed-up muscles during extended resting periods to prevent fatigue and energy loss; fabric stabilizes muscle with compression Designed for all seasons(training of athletic outdoor/indoor activities and sports such as bjj, jiu jitsu, mma, martial arts, Muay thai, Wrestling, Boxing, Contact Challenge Games., baseball, basketball, soccer, American football, NFL, Squat, weight training, cycle, yoga, rashguard, skiing, snowboarding, all weather sports Outstanding design along with ultimate functionality. Before this style was released, new fabric had been tested for more than a year. Eventually we choose best fabric for ergonomic, mechanical and technical features.