SNUG FIT: Our men's closed back slippers are constructed for a tight fit. If you are between sizes, we recommend sizing up. The natural materials may relax over time, creating a custom fit. INDOOR/OUTDOOR: Made with a rubber sole, these indoor/outdoor house shoes are durable and built to handle the busiest of days, whether you're indoor while lounging around the house or outdoors to grab the mail or walking the dog. Slip resistant rubber outsole offers durable traction. TEMPERATURE REGULATING: Stay warm in the winter and cool in the summer - our 100% genuine sheepskin lining naturally adjusts to your body temperature making it a great blend of insulated and breathable. WATER & STAIN RESISTANT: Our slippers are pre-treated to repel moisture and protect against minor stains. The pre-treatment does wear off over time so we recommend applying new water and stain repellent every few months. MOISTURE WICKING: Sheepskin fibers absorb moisture and evaporate quickly helping your feet stay comfortable throughout the day.