Maoko Men's Workout Sports Polyester Sleeveless Shirt,Basketball Training Tank Tops for Boys Quick Drying Shirts 10 Colors Material: 100% polyester, Does well in the washer and dryer- very few wrinkles. Sleeveless muscle tank top in soft polyester featuring crew neckline and logo at center back This shirt is especially good for travel when you need to pack light as this shirt can be washed, and dried overnight and does not wrinkle. Lightweight mesh fabric for improved ventilation