The indoor/outdoor Acorn Men's Rambler Mule combines the best of both worlds in one premium slipper. Wool blend upper combined with genuine sheepskin lining naturally regulates temperature and wicks away moisture keeping feet dry. Elastic panels allows for easy slip-on comfort. The leather sidewall is water and stain resistant, and the removeable contured, memory foam insole is perfect for all-day wear. This rugged slipper has a full length rubber and jute patterned sole for optimal outdoor wear, taking you from home to trail to everything in between.