The Nemo Tuo sleeping pads are two layered, inflatable sleeping pads that combine two inflatable layers with a thin, nearly weightless film that divides the Tuo into two separate airtight levels. This gives you versatility and protection thanks to the option of inflating the bottom layer high (for rough or rocky grounds) and the top layer a little less for added comfort. It also aids you in the event of a puncture as it will leave you with one functional layer in a "pinch". The Tuo™ series of inflatable backcountry accessories brings a new level of comfort to the sleeping pad. Literally. The Tuo™ sleeping pads have a thin film inside that divides the pad into two separate airtight levels, each with their own valve. Not only does this give you complete redundancy in the event of a puncture, it means you can inflate the base layer firm for protection from rocks and roots and keep the top layer partially inflated for maximum comfort. Include a stuff sack and repair kit.