Size: US 8.5M, Eur 38, CM25 Slip into this Alegria comfort slipper and feel Comfee. This backless slipper that's easy to slip on and off. Your feet will instantly appreciate the built-in arch support and comfort footbed. The footbed is made of a combination of components including cork and polyurethane that naturally conforms to the contours of your feet while providing extra softness and bounce. Fully lined in sherpa for ultimate warmth around your feet. These slippers are so comfy that you'll forget to take them off! Quilted wool upper.