I definitely don't work for Vittoria or profit from sales of their products in any way, and I hesitate to write this for fear of jinxing it, but ever since I started using some of their G+ (graphene) branded products, I haven't had a flat yet. I'm mostly riding in Manhattan, which is about as urban as it gets, but also a fair bit in Queens, and both areas have plenty of construction going on. I know I'm just one person and miles away from a significant sample size, but I think their stuff is pretty good.