At schwalbe, the abbreviation dd stands for double defence.
In addition to the raceguard protection belt, a layer of (new) snakeskin fabric strengthens, in particular, the shoulder and side wall of the durano dd ensuring all-round protection combined with minimum additional weight.
The new snakeskin fabric that is used is a monofilament fabric that provides even better cut resistance and greater snakebite protection.
Durano - take the long way home.