I purchased 2 of these. I put one together which was a real pain. The arm has to be put together. Then you put the cover over it and zip. The cover did not fit. Was made too short. Took over 2 hrs. Trying. I have it on but not right. I returned the second one. I was not even going to attempt that. On top of that wayfair sent one box to wrong address. The replacement part never came. The whole shippment was a mess from start to finish. The second chair I kept heat does not work! No more wayfair for me.