Waterproof and weatherproof nylon cover that works flawlessly in all conditions Made from vulcanized natural rubber and Organic cotton canvas enhanced by a thin layer of Structural textile for added resilience Uniquely flexible, maintenance-free, waterproof top is designed to follow the rider's movements to deliver immediate comfort and ease of use Updated fiberglass reinforced back plate that has loops for a saddle bag or other accessory Sturdy weight at 450G that supports as a stable top for the bikes. Designed to absorb shocks and smooth out the ride