The B17 is a Brooks flagship model, ideal for long distance sportive touring, trekking and atb use. It has been on the market for over 100 years, being featured in as early as the 1898 catalogue. As common with high end leather saddles, you take care of it, it takes care of you. Note that it has a "set in" period in which it forms in the shape of your specific bum after which 100 km's a day will feel effortless. Comes with Brooks sepcific Proofide grease and tools to adjust the saddles tension as specified by Brooks.