Fizik tundra 2 mtb saddle high performance with added flex and comfort the fizik tundra 2 saddle features shell nylon carbon reinforced front cover microtex central cover microtex rear coverglossy microtex railkium theres a special finishing process which increase fatigue performance surface rail is brighter cosmetically refined special kium alloy special section of the tube benefits 8 weight reduction compared to solid titanium high grade of strength to weight ratio high