Best Seller | Sierra Designs Nitro UL 0 Sleeping Bag 800 DriDown-Grey/Yellow/Peat-Regular Sierra Designs Nitro UL 0 Sleeping Bag 800 DriDown-Grey/Yellow/Peat-Regular. Specifications for Sierra Designs Nitro UL 0 Sleeping Bag 800 DriDown: Manufacturer: Sierra Designs Color: Grey/Yellow/Peat Bag Size: Regular Temperature Rating: 2 - 15... more | | $359.95 FREE shipping go to store |