Shoulder Caps Molded polyethylene and dual density foam caps. Biceps Molded bicep with length adjustment. Spine Floating spine with polyethylene protection. Sternum Floating sternum with polyethylene protection. Clavicle Added Polyethylene inserts. Stomach Adjustable/Removable stomach protection. Lower Back Adjustable/Removable lower back protection. Ribs Adjustable/Removable rib protection. Throat Adjustable/Removable comfort for neck.