I didn't think I was that rough trying to get this thing around my mattress, but I could've been because it is a California King Size bed with a 4 inch mattress pad on top.  While I was trying to get it on, I ended up ripping one of the sides a little bit, so I guess it won't actually work as it was meant for if that happens.  For myself, I was just wanting something to put around the mattress and pad so that it would be easier to keep them together and also for the dust mite protection.  Oh, well.  Next time I'll know to be more careful.  Probably need to get someone to help hold the mattress up while you pull it on.  I was trying to put it on by myself.  The zipper doesn't seem great quality though.  I can't compare it to others because this was my first.