Alps Mountaineering Element 40 40L Day Pack - Made from lightweight yet durable 200D nylon double ripstop fabric and combined with a suspended mesh back panel, this pack will offer all-day comfort. We have included an innovative magnetic/mechanical buckle with a pull-forward tightening waist belt that you will appreciate. The roll-top upper allows easy access for large items or fast packing, while the lower zipper access allows you to get to the things you need at the bottom. Cored foam with mesh suspension keeps you cool all day, while the oversized stretch side pockets allow for quick and easy access to Nalgene bottles or whatever you can stuff inside. Like all our 30L and above packs, this pack is hydration-compatible and includes a rain cover in the convenient stow-away pocket. Features Lightweight and durable 200D nylon double ripstop fabric Innovative magnetic/mechanical buckle with pull-forward tightening waist belt Suspended mesh back panel Roll-top upper with zipper lower access Cored foam with mesh suspension keeps you cool all day Hip belt pockets and oversized stretch side pockets Hydration compatible interior with hose port Rain cover is neatly stowed in a zippered pocket on the bottom of the pack until needed