1202 denier polyester with Rain Defender durable water repellent and Duravax abrasian resistant base Dedicated padded compartment with exterior zipper entry can hold 15-inch laptop plus large main compartment with ample space for gear and dedicated tablet sleeve Padded air mesh back panel and contour fit shoulder straps with FastDry technology wicks away sweat for comfort Top compartment with dedicated pocket for power pack and cord port Three additional exterior pockets for extra storage with easy access