Troy Lee Designs BP 5850 Hot Weather Armored Shirt Features Shock Doctor technology Neck brace integration patent-pending design is compatible with leading neck braces without compromising fit and protection (removable upper chest / spine and clavicle pads accommodate ideal fit with brace) Strata foam articulates with complex body zones while providing impact protection (removable, rib and bicep pads for coverage preferences) Vent-trak moves air through flexible channels over skin surface to cool the athlete Hex mesh disperses impact with a dimensional mesh construction that allows air to flow freely Open armpit design and wide neck opening for comfort Anatomical design provides a close fit while integrated zones protect the chest, ribs, back/spine, clavicle, shoulders and biceps. PATENTS PENDING. TLD