Due to thick wool-like lining, we suggest you get ONE SIZE UP for a better fit.Like mini puffer jackets for your feet, these slippers will keep your feet thermally insulated all day long. Fleece lined interior regulates the temperature inside to prevent sweaty feet. Memory foam insole provides pillow-soft comfort while molding to the contours of your feet. Features minor arch support to relieve pains from all day standing or walking. Versatile rubber sole is quiet on indoor hardwood floors, and transitions well outdoors for quick errand-running or walking the dog; Anti-skid traction pattern prevents slips and falls on wet ground. Lightweight design lets you move freely all day long; a gently supportive slipper that’s also flexible Machine washable for easy care. This holiday season, get these as gifts for your family members and friends.