1000 Denier bladder material, 1680D nylon non-fade outer bag. 316 stainless steel backplate or aluminum backplate support, single tank adaptor and tank bands included.

1000 Denier bladder material, 1680D nylon non-fade outer bag. 316 stainless steel backplate or aluminum backplate support, without tank adaptor.

horseshoe shape bladder, 1000 Denier bladder material, 1680D nylon non-fade outer bag. 316 stainless steel backplate or aluminum backplate support, without tank adaptor.

21lb are made with 420 denier nylon TPU bladder, and 1000 Denier nylon material for outer bag, with a soft backplate, two stainless steel 304 cam buckles, two tank bungees, four stainless steel bolt snaps and line, sternum strap, crotch strap.

25lb are made with 420 denier nylon TPU bladder, and 1000 Denier nylon material for outer bag, with a soft backplate, two stainless steel 304 cam buckles, two tank bungees, four stainless steel bolt snaps and line, sternum strap, crotch strap.

35lb are made with heavy duty 1000 Denier material for outer bag, and 420 Denier nylon with TPU bladder. with a soft backplate, two stainless steel 304 cam buckles, two tank bungees, four stainless steel bolt snaps and line, sternum strap, crotch strap.

42lb are made with heavy duty 1000 Denier material for outer bag, and 420 Denier nylon with TPU bladder. with a soft backplate, two stainless steel 304 cam buckles, two tank bungees, four stainless steel bolt snaps and line, sternum strap, crotch strap.