Duraskin is Continental's term for their robust puncture protection layer—it's used on the Gatorskins. A lot of recreational road riders have sworn by Gatorskins for ages, but I think there are tires with similar puncture protection and much more supple and fast casing, with better rubber. The Continental Grand Prix 4 Seasons, for example, has the same puncture protection layer as the Gatorskins, and similar tested puncture protection, but is much faster, lighter, with better grip.