I met the team from Klymit at the Outdoor Retail Show in Park City, UT in August 2022. Before this, I had not heard of the brand. They have a wide variety of interesting products, but as a hammock camper, this one captured my attention almost immediately.
I have used my old Thermarest (a circa 1996 standard 3/4) for years, but have always hesitated to take it out in "really cold" weather (I live in northern GA, so this translates to "upper 20's F"). The thermarest pad was easy to "lose" in the hammock, did not provide any insulation on the sides, and my feet were always cold. If I was camping in cold weather, I would pair it with my Hennessey three-season underquilt.
Because of this experience, I had my doubts about the Klymit insulated pad. Fortunately, the Klymit pad is purpose-built for hammocks and is a complete marvel!
Last weekend, I made a trip to the Ellicot Rock Wilderness, with lows in the upper 30's. The pad exceeded all of my expectations for warmth. I don't know that there is a recommended rating, but I would be comfortable trying it again in conditions dipping into the upper 20's.
Rolled up, it takes less room in my pack than my 40 degree underquilt. It probably weighs about the same as a 20 degree underquilt (unverified!).
I have used it in both my "double" hammock as well as an ultralight single. It fits both well. Because my single is a bit shorter than the double, I use it with a ridge line to put a little extra sag in the hammock so I can sleep on a diagonal. Unfortunately, it does not work well in a "diagonal" configuration, but fits perfectly when centered.
The pad has a tacky surface on both the top and bottom to prevent slipping off the hammock as well as the pad from moving in the hammock. This works surprisingly well.
Compared to my Thermarest, the only disadvantage is that the pad does not self-inflate. I have blown it up manually, and have found that it takes 16-18 good breaths. Done a few at a time, this isn't a bad experience. I have opted for a small rechargeable pump, however.
Perhaps my biggest gripe about the product is the difficulty in folding and rolling it. I don't think I have successfully got it back into its bag with less than three re-rolls. Unfortunately, because of its larger size, this almost has to be done on my hands and knees on the ground.
One of the first few times I used the pad, I had failed to seal the "deflate" valve fully (it looked closed!). The pad lost air, but I have learned to double-check this minor detail and the problem has not recurred.
Great product, highly recommended.