Main Materials: Perforated Biofoam chassis,TPR, Polypropylene shoulders, hook and loop, nylon webbing Smaller design specifically geared for children aged 3 though 9 TPR Chest plate for frontal impact protection TPR Back plate with articulation hinge Tough plastic shells for impact resistance Easy to adjust strap system, for parents and the child Soft backing material prevents chafing Perforated biofoam chassis for increased ventilation Adjustable arm guard straps Can be worn underneath or over the jersey