Fly Racing Chest Protector XL 36-16046 BioFoam chassis attachment system eliminates injury-causing plastic rivets Utilizes soft plastics and TPR (Thermoplastic Rubber) rubbers without highpoints that could injure Air channels molded into the BioFoam allow hot air to escape Full upper torso plastic roost deflector Multiple vents in the plastics allow for maximum airlow Optimized fit for most larger riders over 5'11" and weighing over 195lbs Extended BioFoam chassis designed for larger riders Easy to use waist belt buckles integrated into the chest plastic allow for a broad sizing range Neck brace compatible design Adjustable shoulder straps for a custom comfortable fit