Lightweight cellular EVA foam pad design for maximum movement and protection Neck-roll features 40mm high-density sponge foam Shoulder pads with hard shell plastic inserts and foam padding Protected with a durable tight-weave polyester mesh Size range (as measured by chest size): Medium: 38"-42", Large: 42"-46", X-Large: 46"-52", XX-Large: 52"-56"XXX-Large: 56"+