Technical trails and hot weather can really test the quality of your shirt. Make sure you are up to the test with the lightweight, breathable, odor fighting Trail Runner sleeveless t-shir. It's natural bamboo charcoal fabric and superlight sleeveless design helps you stay ahead of the class. Superlight fabric and sleeveless design for cool comfort on the hottest days with the fast drying fabric, you won't get weighed down by sweat. Sleeveless design ensures maximum arm movement. Material: Polyester.