I just got back from a local walk with the Ultravids.
Just about an hour, so it was the type of walk where I'd be happy to carry any size/weight of binocular. But I'm glad I had the Ultravids
They also survived the "sauna test": they were around my neck, under my jacket as I walked up a steep hill and got quite sweaty. No sign of internal fogging.
If there is one other niggle I noticed, compared with the Travelites, it's the eyepiece covers / rain covers. There are two separate ones, and they are quite tight. On the Travelites, there is one combined rain cover and they are very loose. I remember some people complaining they were too loose when I was looking at reviews all those years ago. But I like that you can easily and quickly flip them off. It's a small thing, but it does add up on a walking trip where you are constantly taking them off and putting them on again. I guess a loose, combined rain cover is the kind of thing I'll be able to make/find elsewhere.
Monty,
While the specs i found did indicate the SW 8x20 has + 5 -5 diopter correction vs 3.5 for the UV, the eye relief on the SW is 13 mm vs 15 for the UV. I own both models and for me the UV delivers full FOV with close fitting sunglasses whereas the SW loses noticeable FOV with glasses.
The Opticron compact rainguard will work on the UV and can be flipped off more quickly. You can carefully cut off the all the attachment lugs on the Opticron except the one you actually use for a more compact package.
Mike