While my heels don?t slip/hang off the back, they are very wide for my narrow feet. As you can see, Im sttiill using the same keyboard and having the same problem (I cant geet a newerr keyboard yet to replace thiiis POS). They are warm and fit was good. If I were you I?d find these somewhere else. For this price, this was a no brainer. I love the latex texture it?s a great product. I wear wide because I?ve had bunion surgery on foot. The one time I needed it, it failed. I ordered my normal size, and theyre so comfortable. If anyone knows how, please send some information, that?ll be great!