Greg B.wrote a review of Exped SynMat UL on April 6, 2017
Familiarity: I've put it through the wringer
I agree with the best and the worst reviews here. It is the best mattress I have ever used. It lasted for something between 25 and 30 nights (a few years worth) of use before the baffle delaminated. I used it primarily in a tent but also in a hammock and folded it into a sling that turned it into a chair, I suspect the latter may have been a little heavy handed for a UL product. Anyway, I called support, who gave me an address to mail it to for inspection. $13 for postage and two weeks or so later I had a brand new mattress, despite being passed the 2yr guarantee.
This is definitely not bomb proof, but it definitely IS compact, light, and super comfortable. If it weren't for the customer service, I could not recommend this mattress.
I wouldn't recommend using this for a long through hike since it seems prone to delaminating at anytime.
Best for light weight, comfort, short trips.