Aluminum stay works great - Granite Gear Crown 3 Torso Aluminum Stay Add On Pack

Easy to install, provides a nice stiffening to the plastic support found in the pack. Have not added enough weight to pack yet to detect differences in carry capacity with the aluminum stay, but I expect the claim of stay allowing for an extra 8 lbs to be added to be true just on how it stiffens the plastic support top to bottom and across the pack. I took the pack lid off and some extra straps and buckles I would not use to compensate for the added weight of the stay so I am happy with the crown 3 and stay purchase at the discounted price I paid for a pack close to 2 lbs.