Sport-Tek Youth Heather Contender Tee. YST360Ultra breathability meets an excellent snag-resistant, heathered appearance at an equally great value., 3.8-ounce, 100% polyester jersey, Removable tag for comfort and relabeling, Set-in sleeves, *Due to the nature of 100% polyester performance fabrics, special care must be taken throughout the screen printing process.