@Mango, all brands of leg support are definitely not the same. There are in fact the "cheapo" brands that will not support the way they should and aren't all the same material. Some brands do claim they are breathable and provide the best support when in fact they are so not breathable and cause severe blisters and have not support whatsoever.
Usually if you are looking at anything less than about $65 it isn't as supportive or of good quality. I am so very passionate about this subject because my horse's legs, their foundation are the most important thing to me.
These "Wrap n Ride Boots" don't really seem to have the support a typical splint boot does. A "universal fit" also throws red flags to me. Universal fit in my mind is scary because I want a boot that is going to have a personalized fit to MY horse and not just fit a general horse. Having the correct size in protective boots is how the boots protect in the first place.
Everyone has their own opinion prefer a certain brand or two. I prefer Classic Equine "Legacy" boots or Pegasus boots. They have always offered a great snug fit that is supportive to the all important splint! I have used polo wraps on the back legs and I feel that if they are really wrapped correctly they can provide some support, nothing super great but the way they are wrapped are the most important.