I'm posting this because Exped added a 78"x26" version to the Synmat UL7 line recently. So far I have seen no write-ups of the LW (Large Wide) model. These are initial impressions having taken delivery of one a few hours ago.
My Synmat UL7 LW arrived in the mail today, three days ahead of schedule (thanks REI!) According to my scales it weighs in at 601g (without the stuffsac and repair kit) - that's 11g over the spec, if my scales are to be believed, but close enough.
Even with my inexpert use of the schnozzel pump bag, which I had to purchase separately, the pad filled with just a little more than three bags of air, and in less than 90 seconds.
This shows the dimensions compared with my Downmat 7 M:
And my NeoAir regular (sorry, not a great photo, but I think demonstrates what I've felt - the NeoAir is narrower than other 20" pads):
The Synmat UL7 LW has the same number of air chambers (8) as the Downmat 7 M, but each chamber is wider.
Here's the acid test for me - does the LW fit in my solo tent - a Hilleberg Soulo? Perfectly width-wise.
And with about 8" to spare length-wise.
The material is much more slippery than my Downmat 7 or my NeoAir, but given the fit inside my Soulo, I doubt I'll be sliding off it any time soon. In another shelter, the verdict may be different, but so far I like it. Fully inflated, the pad is comfortable to lie on, both on my back and on my side. The vertical air chambers mean no more deflations when I roll to the side (my biggest beef with the NeoAir). Sitting up, I do feel the air shift, and there's a similar feeling of 'bottoming out' as with the NeoAir. I'll probably put an 1/8" pad underneath in colder temps and when I'm dealing with rockier terrain.
Next up, time to see how it works in the field. Hoping to report back after next weekend.