The Black Diamond Blitz backpacks are a fast and light alpine climbing pack stripped down to the bare essentials. The minimalistic design features a removable back panel, drawstring lid and removable waist belt. There is a rope strap to secure your rope to the top of the pack. The Blitz comes in two sizes; a 20 litre at under 400 grams and a 28 litre at under 440 grams. It is a highly functional, hardcore pack for your mountaineering missions. Back Diamond Blitz Backpack | Outdoor 2016