Scratch M5 is the new line of saddles that use 4.0 technologies; innovative in terms of size, shape and ergonomics, they are suitable for multiple uses from road and off-road to Triathlon The Round Shape of the M5 allows the pelvis a natural rotation, creating stability and support for the lumbar areas and distributes pressure over a greater area MSS Multi Section System - This technology provides three different individual zones mapped and separated along the saddle, each composed of different interactive foams and single-cell padding Nack models feature a Nano Carbon composite rail paired with reinforced seat clamp area for the perfect fusion of performance and reliability Tirox model features an aerospace light Ti-Alloy rail that provides a balance of weight and strength New T-Shape base offers comfortable unisex design Road/Off-Road Nack MSS Hard Black 250mmx140mm 155g UnisexUPC/EAN/GTIN: 4711946193317