BOARD HARNESS WITH VELCRO® AKA spyder strap This board harness system is for securing a patient to a backboard. Constructed of nylon webbing with Velcro® hook and loop closure. An adjustable spacer keeps the cross straps in place during placement and prevents all straps from falling together. A storage bag is recommended and is found below. #BB-30: 40” span with a weight of 32 oz. #BB-30-XL: 55” span with a weight of 38 oz