This is the continental grand prix 4 season 700c folding duraskin road tyre oe technology for the hell of the north styled on the gp4000 but with extra protection layers for harsh weather conditions with two vectran anti puncture layers beneath the tread the gp4 season is tougher than ever combined with continentals tear resistant duraskin mesh from bead to bead and max grip silica rubber compound the gp4season utilises all of the best continental protection materials in one classy wor