Storelli BodyShield Sleeveless Undershirt High-performance PU foam provides extreme protection from impact and abrasion Groundbreaking ChesTrap chest pad is designed to help trap hard shots and reduce rebounds Optimal pad placement and light materials for maximum flexibility Premium moisture-wicking compression fabric optimizes comfort and breathability Advanced anti-microbial foam treatment reduces the risk of bad odor and infections 3mm of stretchy Poron XRD padding on ribs. Body 82% Nylon, 18% Spandex. Foam 100% Urethane Foam.