I also wasnt sure if these were counterfeit as others have stated in these reviews. When I walk I find that I have to crunch up my toes to keep these from falling off, I actually tripped on them the other day. Lastly, the zippers. The Rayz, however, are a completely different story. I will find some weather strip to augment the hard plastic feet. Without bothering me at sleep time. It is pretty but not at all convenient and you will probably have to polish it with a dark wood polish to hide the blemishes. People like me need products like this too, and manufacturers forget that or dont care. They smell like mildew like they?ve been wet. I wear a size 10-10 1/2 normally, so figured 10s would be good.