Rubber sole The SH-GR903 (GR9) is our Flagship Flat Sole Mountain Bike Shoe: Durable, stylish and designed for high-adrenaline gravity riding Superior Traction: ULTREAD rubber outsole with hexagonal tread delivers legendary pedal grip Trail-Ready Design: Asymmetrically raised padded ankle collar and sidewall sole protect against bumps and scrapes Performance Materials: Synthetic leather upper with mesh panel repels water and keeps you cool on long rides Casual Comfort: Skater-style design with durable laces and metal eyelets for a familiar fit and feel