600 denier polyester with Rain Defender durable water repellent. Backpack and cooler in one. Fully insulated base compartment holds up to 12 cans and keeps them cold for 8+ hours. Large main compartment with mesh pockets for additional food items, apparel or other gear. Front zippered pocket with two mesh pockets and key fob. Two exterior elastic mesh pockets. Two additional front slash pockets. Contour fit shoulder straps. Dimensions: 12.5" x 17.75" x 8