Trekker Chair is a lightweight kit to turn your mattress into a chair. It's hard to deny yourself the added luxury and convenience of a chair when it only weighs 10 oz (290 g). Thermarest's popular Trekker Chair uses ultralight nylon and fiberglass poles to pack small and creates a comfy place to rest and recover after a long day of hiking. The elastic sleeve edges stretch to fit both NeoAir® and self-inflating pads. The Thermarest Trekker Chair 20 fit sleeping mat with width of 51cm.