The Volt is a versatile saddle that has become WTB's most popular MTB saddle. The ideal time-tested shape for speed and comfort.the upward curve of the rear part of the saddle, the subtle drop of the toe and the thicker padding in the middle are the reasons for its success. How to choose the right saddle? The WTB Fit Right System app uses a simple method to determine the size and type of saddle. Based on individual biometrics and riding position, the width of the sit bones is determined and then compared to the complete range of WTB saddles. No it's not a joke, you really need to measure your wrists. :) USAGE: Gravel - Cross Country - Trail - Enduro - Bikepacking SIZING: Narrow, Medium, Wide - 135, 142, 150 x 265mm (Carbon only available in 135 mm) Rail Material Rail Color Weight (Narrow/Medium/Wide) Details Carbon (7mm x 9mm) Carbon 165g Microfiber Cover / Flex-Tuned Shell / DNA Padding Titanium Metal and matte black 208g/225g/230g Microfiber Cover / Flex-Tuned Shell / DNA Padding Cromoly Metal and gloss black 290g/310g/315g Microfiber Cover / Flex-Tuned Shell / HLX + Gel Padding Steel Gloss black 292g/315g/320g Microfiber Cover / Flex-Tuned Shell / DNAx Padding