Billabong Unisex Command School Backpack Review June 30, 2018September 23, 2018 - ChainWarhawk 95% polyester/5% polyvinyl chloride Imported textile lining Zipper closure 16″ shoulder drop Hand Wash 20″ high 12″ wide pockets: 6 slip, 1 zip, 6 exterior Show more Main compartment, laptop compartment, sure grip base, padded back panel, helmet loop, and ipad pocket.