600- denier polyester with PVC coating. Ventilated zippered main compartments with two zipper pulls. Two bat holders at sides with dual elastic drawcord and cordlocks. Metal fence hooks .Zippered front compartment with two zipper pulls. Zippered inside pocket. Expandable separate zippered lower compartment with two zipper pulls. Padded back for support and comfort. Padded shoulder straps with adjustable side tabs. Web handle at top of backpack. Plastic hardware. Durable vinyl on bottom of backpack to retain shape. Bottom board attached to inside of backpack 13" x 25" x 10".