Axiom 40 Backpack - Men's by Black Diamond Camping bag Black diamond axiom 40 blue steel backpack M BD681074BLSTM__1 Black diamond axiom 40 blue steel backpack M BD681074BLSTM__1 A mid-volume superlight pack with reACTIV suspension for fast-and-light packers unwilling to sacrifice comfort Patent-pending reACTIV suspension with Open-air back panel and Top-loading roll-top closure, removable top pocket, quick and clean volume adjustment Soft, breathable 3D mesh on hip belt and shoulder straps Dual hip belt stash pockets, side stretch pockets and front compression stretch pocket Trekking pole/ice axe loops, hydration compatible and Also available as women's-specific Astral 40