The Gossamer comes in two sizes: choose the AG2S for our slightly shorter packs (the G2), or the AG2L for our longer packs (the G4).
Made of polycarbonate with vertical-axis stiffening channels, the Gossamer gives an ideal mix of vertical support and torsional flex. It is quite tough and is superior to polyethylene frame-sheets which form the core structure of most internal frame packs.
Once you're equipped with a Gossamer, you'll be able to switch your pack back and forth, selecting a style that best meets the needs of the day.