The
Eberlestock Endo G-type Internal frame is a new accessory for Eberlestock in 2011. The Endo Internal frame fits inside many of Eberlestock days packs including the X1, X1E, Gunslinger II and X4 packs. These packs while already suited with a frame sheet benefit from the addition of the Endo frame because of the rigidity added. The extra rigidity allows the pack to carry weight more evenly and helps to distribute the packs weight onto your hips instead of pulling back on the shoulders. The Endo Internal frame only weighs 4oz so it adds very little weight to the pack yet increases it's ability to carry weight substantially.
The Eberlestock Endo Internal frame has a slight contour which enhances the lumbar support of the pack.
Eberlestock Endo 
