The Ionosphere 5 Sleeping Mat is Rab's lightest, most packable pad for 3-season backpacking trips. Despite an ultralight packability, the Ionosphere still has a little bit of Stratus R insulation to stay warmer in the alpine's often-chilly temperatures, and TILT technology reflects heat back to you for even more warmth. The mummy-style construction helps keeps weight to a minimum, while still giving you enough coverage to get a solid night's sleep at altitude. Rab included a stuff sack that doubles as a pump for breath-free inflation.