Schwalbe Kojak 26x2.0 how durable ?

[slawek371]

Hi. I'm currently using semi slick Kenda Khan 26x1,95 tires(K-shield) on my MTB XC that weights about 900 grams(one tire). I use this bike mainly for pavement and forest paths but sometimes i do some offroad. Because my current tires are quite heavy i am thinking about replacing them with something lighter. I'm considering Schwalbe Kojak 26x2.0 but i'm worried about their durability. My weight is 70 kg.. Kojak weights only 570 grams. Can they be punctured easily ? Does any one of you know if slicks like that can be used offroad without damaging it ? Can it be cutted or punctured by some sharp stones or gravel ? I know that Kojak's can be slippery but i would use them on low pressure for occasional offroad. I just would like to know if it can be damaged by occasional riding on some sometimes rocky singletracks.