Dan
I chatted with one of the designers at StoS about the EtherLight before I bought it.
They say their aim was to build something where the baffles would never fail in the field. And they were claiming they had achieved this – no failures reported at the time.
They feel that the weld method used on standard lightweight pads is inherently fragile. So they use a higher-end medical/aerospace welding system that they claim is far more reliable.
They were advised that the fabric they use in the EtherLight was the lightest that would hold the weld.
The bonus is that each weld is somewhat like an independent spring on a conventional mattress – when you push down in one area, it doesn’t bulge up in another. It’s stable right to the edge, and so far I’ve never once woken up on the ground, in contrast to my Synmats.
Additional attractions are the comfort, the pillow attachment system and the superior valve design.
I’ve had Synmats fail on me twice – a valve and a baffle – and neither experience was fun. Plus I never found them particularly comfortable.
StoS are saying that the EtherLight is as light as you can go with current technology if you want a truly reliable mat. For me the reliability and comfort is worth the extra weight. A bad night’s sleep wrecks the next day, so it seems like a sensible investment. But when I was younger my priorities would have been different, so like everything in a sleep system it seems to be a very personal choice.