Slippers by UGG, Suede upper, Slip-on design, Fluffy lining, Branded tread, Treat with a leather protector, 100% Real Leather Upper. Beginning the UGG legacy in 1978, Australian surfer Brian Smith took a trip to the USA with a bag full of sheepskin boots. Adopted for their natural warmth and laidback appeal, UGG? s high-grade sheepskin finish wicks away moisture, keeping your feet close to your natural body temperature.