This has been invaluable for my bug eaten horse! He rubs on everything, including a metal gate and t-post but has only put one small hole in it after 3 weeks so the durability is very good. I would not recommend this if you have a very big horse. Mine is 15.2 and about 1100 pounds. In other words, he's a quarter horse but not a big stocky one. I bought him an XL (the largest) and it just fits. It's actually a tad tighter than I would like in the shoulder but doesn't seem to be rubbing at all. I love the full neck! The only thing I really haven't been thrilled with is the strap which holds the chest piece to the belly piece. It's actually a little strange on the connection (I'm still not sure I've got it down right) and does come undone. It would be nice to also have it more adjustable and wider as the flies do still get in there. Overall, this has been a life saver for my guy this summer and the complaints are far outweighed by the good. I do have to qualify that I've never owned a full sheet before, but with that being said I don't think I would bother to try anything else. At the price and from what I have read on other sheets, this seems to be a good deal.