The Petzl BUG is an 18 Litre climbing pack for singe-day, multi-pitch climbing, and everyday adventures.  

Designed for multi-pitch climbs, the BUG allows you to comfortably carry all your gear, including a hydration system, food, clothing, shoes, and more. It provides maximum comfort and give your shoulders freedom of movement, with minimal bulk, a foldaway waistbelt, and high positioning for use while wearing a harness.