The invention concerns a bicycle saddle having a seat portion and a nose portion with the nose portion longitudinally flexible and laterally rigid relative to the seat portion wherein the degree of flexibility is adjustable. The user-defined tunable includes a tunable name, an assigned value, and an expression that relates the user-defined tunable to one or more kernel tunables. A first species is chemisorbed to form a first species monolayer onto the substrate from a gaseous first precursor comprising at least one of an amido metal organic compound or an imido metal organic compound.