Ergonomically designed for the forward leaning riding posture of triathlon with special attention to female anatomy Reduces back fatigue and improves pedaling ergonomics Padded for maximum performance over long distances Tri Front model was developed for riders who tilt their pelvis forward significantly and place more weight on the front of the saddle Tri Mid model was developed for riders who tilt their pelvis forward less and place more weight on the mid section of the saddle Saddle nose width = 54mm Front model and 49mm Mid model Womens models include a highly flexible insert in the genital area for pressure relief Recommended sizing for sit bone width: S/M 912cm, M/L 12-16cm