Diamond-Square knit, stretchy knit by construction made of 60% mat micro polyester and 40% of a shiny polyester fiber. Its multi-channel construction gives it a mini-square texture which enhances breathability and moisture wicking away from the body. It dries very quickly. Features: Air-Stripe knit built with channels for breathability and moisture wicking to keep you cool and dry. Pro Fit, Full length zip, Elastic hem, Front reflective logo, Back reflective arrows, Flat lock seams, 3 back pockets.