The Demon X D3O back protector is a durable, lightweight, flexible back protector. For this mtb, ski and snowboard back protector, Demon uses Viper D3O material across the entire back. Between the D3O material and your back, a 3 mm thick soft foam is processed for extra comfort. Adjustable shoulder straps and a hip belt keep this back protector tight to your body, so your upper and lower back are optimally protected. Click here to read more about D3O material and why it is perfect for snowboard protection.