Most flats come from not having enough pressure in the tire, causing friction between tire and tube when the inside deforms, especially when riding over curbs. Bad quality tubes and tires plus improper installation also contributes a lot.

Reinforcement in forms of kevlar and such might provide some additional protection but these types of penetrating punctures are rare in the first place. It obviously doesn't make things worse so for peace of mind and some extra protection could still be worth it anyway. Just the fact that these are high quality tires to begin with will help a lot.

I managed to find the cause of most flats - usually it was a small piece of glass or a small sharp stone (as used in winter on icy roads), still stuck in the tire. Maybe we have sharp roads and soft curbs in Prague :-)