Give it time… A thing of utmost quality… The B17 Utmost is not an update, it is the finest expression of the B17 we have ever produced. To reach this point required persistence bordering on obstinacy. For years, we went back and forth to the tanneries, poring over details, testing, discarding and beginning anew. A leather top of the very highest grade, tubular stainless steel rails and a redesigned tension pin are the biggest alterations. The fine craftsmanship required to assemble them remains entirely unchanged. Exquisite, High-Grade Leather Tubular Stainless Steel Rails Redesigned Nose and Tension Pin Extended 10-Year Guarantee Handcrafted Since 1866 Ages Beautifully Lasting Comfort & Breathability