This short sleeve shirt by Ariat is 100% polyester. Who says you can't wear black 95 degree weather? Because this shirt is equipped with the most advanced Moisture Movement Technology (MMT) available today, you can do just that! MMT boosts your body's natural cooling process by drawing heat and moisture away from the body for quick evaporation. The athletic cut of the shirt will keep any guy ready for all outdoor activities. This Ariat shirt keeps the body cool and dry, which is perfect on a hot day on the golf course. The collar gives the shirt a nice professional look to it, but still very comfortable. The black color can go with any style jeans and belt for a dressed up occasion or a casual day at the office.