Acorn had a similar slipper about 10 years ago that quickly became my favorite to wear all year round. The bottom eventually wore out after about 6 years and the search was on! FINALLY! These slippers are so comfortable, so warm, and perfect for any time. Can run outside with them on--there is ice this morning and they still stayed warm and did not slip! I even bought a second pair to make sure I had them for a long time! Highly recommend!!!