Ultralight Mattress

The Ultralight is certainly lighter, and a comfy pad compared to a lot on the market, but the Flex Air is on par with Thermarest Neoloft and Exped Megamat Ultra, except lighter and less balloon-like compared to the Neoloft.

I’ve got one of their ultra lite pads. It’s the most comfortable pad I’ve used that wasn’t self-inflating. I’m a side sleeper and prefer it over both my nemo quasar and nemo tensor.

Consider the zenbivy UL mattress. In the size you list it’s 482g and 4.8R. It’s also very comfortable and quiet. I bought the largest size, however. The extra weight is worth it to not wake up on the tent floor - I can’t go back to a narrow pad any more.

I debated these two and picked the Zenbivy UL instead as it rated higher for comfort.

I have that same pad and it is cold. I bought a new zen bivy pad to replace it and will just use the BA in the summer

I have the Vango Aotrom Thermo Platinum XL and it has lasted me for years in really low temps(-6⁰) obviously there's more to a sleep system than the pad to be comfortable in those conditions. I have recently moved to the Zenbivy Ulralight Mattress which has the relatively same R rating but way more comfortable from construction and dimensions.

I had the Vango Aaotrom Thermo Platinum XL for years and slept fine on that as a fidgety sleeper. Had it out at -6⁰C once and it handled it fine with a lightweight foam mat and decent bag. Just upgraded to a Zenbivy Lightweight Matress which is waaay comfier though and slightly higher R rated.

I got the wide/long version of the Zenbivy (being long/wide myself) and it is a great mat in my opinion. It's got good thickness, flextail compatible and I really like the baffle system it has compared to others. I can also atest to it's R rating as I have had it out in negative temps on my tent floor without a footprint and not felt any cold spots.