The longer sides follow the contours of my saddle and the fleece & pro impact insert cushion my horses's withers and shoulders. The Large size is perfect for my 18" dressage saddle. I purchased the pad to help with saddle fit while my horse is being conditioned after an injury but he seems so comfortable that we might use it beyond our rehab work. I just received the pad so I can't report on the durability but it is well made looks like it will hold up well. I purchased it in black and it's very attractive.