Hello, I have that exact rug from that exact website :smile:
I use it on my gelding who does not have Si but does have a fly allergy, used it all last summer, was on 24/7 and survived brilliantly, but we also have all electric fences, with no trees in the field, so nothing to scratch on. But is easy to fit and relatively easy to get on (as with all of these, am always amazed how tolerant they are to having these rugs over their heads, especially when I get it on, then realise it is inside out and have to take it off and start again....)
Can highly recommend, plus EC are so quick to deliver.