Compression fit and stretch fabric for muscle support and freedom of movement. Improves circulation for better muscle recovery.Ultra-thin, lightweight design keeps athletes fast and agile. Moisture wicking performance fabric keeps you dry and comfortable. Provides muscle support to reduce fatigue. Keeps arm muscles warm and skin dry. Provides protection from UV rays. 83% sublimated Polyester/17% Spandex. Great for baseball, softball, basketball, football, running or crossfit.