The fully welded durable TPU is smooth to the touch, while also being extremely durable and strong. Bonus: recyclable and biodegradable. Each size is designed with an innovative tailgate window that allows backup camera visibility and tailgate handle access without removing the tailgate pad. The full-size tailgate pads hold up to six bikes, the mid-size tailgate pads hold up to five bikes. All are securely held in place with sturdy nylon straps