Open the Stingray 3-Day Pack at the top, left or right side of the main compartment. The zipper extends to the bottom of the pack, allowing the user to lay it flat if needed. The Stingray 3-Day Pack holds up to 2200 cu. inches of gear and is available in three colors. This pack is constructed of 500D nylon and is built to withstand anything. Plus, a padded compartment at the back accommodates either a laptop or hydration reservoir as well as a padded waist buckle to help distribute the weight of your gear during all day wear.