Wear as chest or lumbar pack. This is a must have for those of us downsizing our gear on the beach or river. Much less obtrusive than a vest. Two big main compartments. “Zip down” fly bench with replaceable foam. Compression straps. Accent webbing, climbing cord loops for tools, accessories. Interior pockets. Air mesh backing. Two mesh water bottle holders (bottles not included). 10.5″ x 7.5″ x 6″.