UGG Women's Riviera Fashion Sneaker 100% Leather/Textile Imported Synthetic sole Heel measures approximately 0.5" Sporty poly spandex knit and full-grain leather slip-on Insole: enerG Comfort System with built-in arch support; additional layer of open cell PU foam for breathable, moisturewicking, anti-microbial comfort; lined with leather Outsole: Treadlite by UGG