
Exped
MegaMat Series
Car camping comfort champ, but some side sleepers find it thin.

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Hah yeah- I still use a 10y/o Exped Symnat UL. Vertical baffles, r value around 3. 13.5oz with the repair kit. With just one exped official repair, its lasted around 3000 miles. I keep considering changing it and have never found something to justify a change.
My exped synmat UL 7 popped a baffle after 10 years. Was sad having to go shopping right before a big hike buy I was pretty happy with my new mummy 3R LW. I haven't found the exped pads particularly noisy, especially compared to thermorest. My favorite trick though is using a lightweight sleeping bag liner as a fitted sheet. Keeps the pillow in place, gets rid of all the noise and as a quilt user it's much nicer than sleeping on the bare mattress
I carry this type of pad for added cushion and as a backup for a possible failure of my main Exped Synmat 7. I would not use something like this alone because I would feel the hard ground and not sleep. Add the few pounds and get an inflatable and sleep like a baby.
I have an Exped as well as the bestway one often mentioned here and the zen bivvy one, and the exped is the comfiest and warmest hands down. However I can’t remember which one it is exactly (it’s an old model, now deprecated, but 7 cm deep). Also has by far the best inflation system.
No the sleeping bag won’t help much. To get a significant bump in comfort you’ll have to jump into some heavier pads that are still compressible enough to bring backpacking. Pads like the Thermarest Neoloft or Exped Megamat Ultra. I have a Tensor All Season and find it comfortable, however my Exped Synmat 3D (older version of the Megamat Ultra) is definitely more comfortable. My brother has the Rapide SL which is similar to the Tensor in comfort.
If you get a Big Agnes it will squeak against the tent floor all night when you move. I use Exped. Not completely noiseless, but built differently than the Neo pads and not a Big Agnes. I have a discontinued Hyperlite, will replace it with an Ultra when it develops too many leaks just as I did the Synmat. I wish they still made the Hyperlite.

Exped
MegaMat Series
Car camping comfort champ, but some side sleepers find it thin.

Exped
Ultra Series
Lightweight side-sleeper comfort, but a bit pricey and bulky.

NEMO
Tensor Series
Ultralight side-sleeper comfort, but slippery and prone to leaks.

Big Agnes
Rapide SL Insulated Sleeping Pad
Comfortable with side rails, but heavy and warmth claims disputed.

Therm-a-Rest
NeoLoft™ Sleeping Pad
Very comfortable, good service, but heavy and bulky for backpacking.

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Exped - MegaMat Series

Ranked #1
Therm-a-Rest - NeoAir Xtherm Series