Infinity 50 Backpack - Men's by Black Diamond A lightweight top loader with ergoACTIV suspension for the progressive multi-day backpacker Patent-pending ergoACTIV suspension with Open-air back panel and Top loading with floating top pocket Soft, breathable 3D mesh on shoulder straps and removable, interchangeable hip belt (tool included) Hip belt stash pocket, side stretch pockets and front compression stretch pocket Retractable trekking pole/ice axe loops, removable sleeping pad straps, hydration compatible and Also available as women's-specific Innova