I have ridiculously cold feet, even in the summer, so keeping them warm in the winter is a real challenge. I wanted something that would "envelop" my feet, and these fit the bill. They are a tad cozy - I wear a 7.5 and got an 8. They're snug, but comfy. No more cold feet after these slippers! They're plush, warm, and make my feet feel so toasty. LOVE THEM.