420D Ripstop with waterproof urethane backing. 5 zippered roomy compartments to organize and store essentials. 2 contoured and insulated water bottle holders. Foam-padded bottom panel lined with durable, soft, short-pile fleece to protect the saddle and the horse�s back from the weight of the pack�s contents. Nylon straps with reinforced tabbed ends. Extended nylon-tabbed zipper pulls for easy access to all compartments. Nylon adjustable straps for tying down a coat or securing contents. All outer seams reinforced with durable binding.