The Alp has a 100% boiled wool upper and is naturally water-resistant and temperature-regulating in all seasons. Features include a cork-latex orthotic-quality removable anatomically-correct footbed with longitudinal and metatarsal arch support. A form fitting gore elastic vamp, and a heel loop for easy one-handed on and off. A wide toe box allows toes to move naturally and spread freely, and a soft padded ankle collar accommodates custom and over-the-counter orthotics. All while being slip-resistant with a non-marking waterproof rubber outsole and a rocker heel. Machine washable but be sure to air dry.