The Fi'zi:k Gobi M5 VS Manganese Saddle delivers exceptional comfort out on the trail, and it's specifically designed to withstand the rigors of marathon and all mountain riding. Fi'zi:k takes its sleek, race ready Gobi design and adapts it to riders who benefit from saddles with pressure relief cutouts, adding a channel down the center and surrounding it with low density padding to ensure a smooth, accommodating ride. Accommodating doesn't have to mean soft and heavy though, and in the case of the Gobi M5, which weighs a claimed 240g, it doesn't. Fi'zi:k shapes the 126mm wide saddle on a carbon reinforced nylon shell that's supplemented with its WingFlex and TailFlex technologies. These combine to allow the saddle to flex during the pedal stroke and as you hit rough sections of trail without yielding to the extent that it causes chafing, irritation, or a trampoline effect. There's a fine line between too stiff and too flexy, but Fi'zi:k finds the balance with the Gobi M5 VS. The hardworking shell receives protection from the elements in the form of a combination of Microtex and Cordura, both of which resist wear during exposure to the weather and the trail. A set of manganese rails dutifully supports the shell and stands up to miles of eventful all mountain riding.