Half chaps made of SYLKA material. SYLKA is a synthetic leather that is highly durable and easy to clean. Adapts wonderfully to the shape of your calf. With elastic inserts for the very best fit. (Small Calf 13 * Hight 15.5)(Medium Calf 14 * Hight 16)(Large Calf 15 * Hight 17)(Extra Large Calf 16 * 17)