The Petzl Bug is a climbing bag designed to include lots of climbing-specific features, which make it great for day-long multi-pitch climbs. The Petzl Bug is perfect for the approach as well as the climb; strap your rope to the bottom; store your jacket or a water bottle in the mesh side pocket; store your guidebook in the hidden top pocket and fix your emergency head-lamp to the internal loop at the top of the pack. It does literally, everything! The Bug is also hydration-system-compatible and features a stowable waist-belt, daisy chains down the back for extra storage and buckled compression straps. Good work, Petzl.