I have a few of the original Rambos and I have two of the Rambos that have the leg arches.
The originals that I have are old. They are about 10 years old if not older. One I purchased used about six years ago and the others I bought new when I was living up north. They have been repaired and they have been washed and they are still kicking. I have one sheet and then I have the navy with red trim (Medium).The rest that I have are heavy weight. They have held up and they are still waterproof after all these years. They don’t shift and they keep the horses warm.
I have one with leg arches but it is in a 100g so light medium and I really love it. I like the triple tummy surcingles and I feel it keeps the blanket in place really well.
That being said, I have a bunch of old Rhino Wugs for rain sheets and I adore them. I love the high rise neck and I think it keeps the rain from getting in. If the horse is out in massive rain with a heavier blanket on I put the rhino over top to keep the ran from running down my horses neck.
I have started buying only high rise necks or full necks due to the cold rain we sometimes get here. My horses are fully clipped and I want them to not stand outside shivering when rain gets down their blankets from the neck. I really like the Wug blankets. I like the clip closure, I like the quality, and I like the triple surcingle. I hate the price though. My girl friend bout heavy, mids, and lights for three of her horses and the total was about 1k per horse for 3 blankets.