What Our Gearhead(R) Experts Are Saying:"I took the Ultra 6. 5R Duo on a cold-weather trip with my partner, and it made a huge difference. It's warm, packs down smaller than you'd expect for a double pad, and the individual baffles help minimize movement. Perfect for alpine missions where we're sharing a tent."When the nights get long and the temps drop low, we don't sacrifice comfort just because we're sharing a tent. The EXPED Ultra 6. 5R Duo sleeping pad is built for fast-moving missions where warmth, weight, and pack space matter-and where sleeping together just makes sense. Designed with SynMat Plus Technology(TM), this duo pad features recycled microfiber insulation combined with a heat-reflective foil layer to achieve an ASTM R-value of 6. 4. That means it keeps us warm down to -4degF, even on cold ground or snow. The 3. 5-inch thickness keeps things plush, while the recycled 20D ripstop polyester shell stands up to rugged camps. Despite its double size, the Duo packs impressively small and stays light enough for winter backpacking or bikepacking.