The Vevor dog car seat cover back seat extender creates a larger, more comfortable riding space for dogs in cars, SUVs, and trucks. Its hard honeycomb bottom supports up to 350 lbs to provide a stable surface that helps prevent sagging. The 7-layer construction includes waterproof, scratch-resistant 600D Oxford cloth and a non-slip bottom for added durability and protection. A breathable mesh window, storage pockets, and included safety belt add convenience and security during travel. The cover is also foldable, removable, and washable for easy everyday use.