4-ounce, 100% polyester interlock Wicks and dries quickly 50+ UPF rating Tag-free label Narrow ribbed collar Double-needle coverseamed neck Double-needle sleeves and hem Due to the nature of 100% polyester performance fabrics, special care must be taken throughout the printing process.Given the extreme heat required for sublimation, please consult with your decorator. It is highly recommended to sample test product by color before production.