Prologo zero ii pas nack road saddlethe zero ii is a very comfortable flat saddle that is designed for short rides or when the riders changes his riding position frequently features prologos pas perineal area system cut out for added pressure relief this saddle uses prologos flat saddle shape that gives the rider a comfortable seating area on short to m edium rides with the weight being shared equally throughout the saddle shape flatend use cross countrylearn more with the prologo