10 Oz. - Heavyweight.Elastic Drawstring Waist.55% Cotton, 45 % Polyester. ProForce"s 10 oz. heavyweight uniform offers the biggest selection when it comes to colors and pants styles. Combining the perfect blend of 55% cotton and 45% polyester, this uniform is easy to care for. All hems and stitching are reinforced for added strength. This 10 oz. set includes jacket and pants with elastic drawstring waist.Set available in white or black.