Evoshield Racerback Chest Guard Shirt - Girls' Grade School Join the evolution with the EvoShield Back and Chest Guard Shirt. This padded shirt offers superior comfort and feel by utilizing Dispersion Technology, which absorbs and disperses impact across layers of foam padding. Patented composite material and ergonomic design custom forms to your body through a revolutionary air-activated hardening process. The ultra-light shield is fully breathable and made of composite material covered in mesh with a soft polymer backing. Insert pads into shirt and wear for 20-30 minutes, and the pads form to your body for superior protection at the plate. 82% polyester/18% spandex. Imported.