The Xtreme is ready for urban work school or outdoor activities. 1 680 denier polyester with 600 denier polyester canvas accents Hydration port at top Main compartment with dedicated padded laptop sleeve/hydration pouch Air mesh padded back panels Ergonomic air mesh padded shoulder straps Sternum chest strap Stretch air mesh side pockets Front zippered pocket with key clip Side-entry front flat zippered pocket Daisy chain attachment system