ISM PN 3.1 SaddleThe ISM PN 3. 1 Saddle takes the high performance PN 3. 0 chassis and adds increased padding for riders seeking a slightly softer feel without sacrificing speed. Its 120mm rear end and tapered edges allow the saddle to virtually "disappear" beneath you, providing exceptional comfort for long days in the saddle. Designed with a nose less shape, the PN 3. 1 is engineered to eliminate soft tissue pressure and genital numbness by ensuring maximum blood