GOSSAMER GEAR Mariposa 60GOSSAMER GEAR Mariposa 60 backpack is Gossamer Gear's bestseller with a removable internal frame, load lifters, and 7 built in pockets, that weighs only 968g (Medium). New updated version features new PVT frame, recycled materials, load lifters, ergonomic hipbeltnew PVT frame, recycled materials, load lifters, ergonomic hipbelt It provides plenty of storage and roomy pockets for organizing wide range of your gear from bottles to food, tent, clothing