Kelty Light Top Sleeping Bag
I just spent 18 nights in the Grand Canyon with this sleeping bag. It was great! I could start the hot night out sleeping with the warm part on the bottom and just the light thin layer on top. Then as the night chilled I would simply roll over with the whole bag until the warm side was on top. It is so light I could hang it in the sun on a light line between things that could hardly be called trees to "wash" it in the sun!