The 2009 Gossamer Gear® Mariposa™ Plus and new Gorilla™ backpacks have a new look. You might not notice the difference by just looking at the packs, however, but you’ll definitely notice when you wear one. That’s because for the first time ever, we’ve introduced a curved stay for these two packs. Made from aluminum rod and weighing just 3.4 oz., this single piece curved stay comes pre-bent with a universal S-curve that should fit most everyone’s back. Slight adjustments can be made to these stays if needed. This stay will ship installed in the 2009 Mariposa™ Plus and the Gorilla™ backpacks. We will no longer be shipping the carbon fiber straight stays. We will also be shipping the remainder of the 2008 Small and Medium Mariposa™ Plus backpacks with the new curved stay. We can retrofit your Mariposa™-series pack, including previous models of the Plus, the Mariposa™ Standard and Miniposa™ packs, with the new curved stay if you send it to us along with a check or money order for $35 to pay material, shipping and sewing costs.