Not entirely puncture-proof but almost
- Familiarity: I've put it through the wringer
I've used these tires for several years and have had far fewer flats with them and they last longer than any other tire I've used. I have had a few flats, every time from tiny pieces of sharp metal that manage to pierce the hard shell and remain stuck in the tire, so I always check the inside and outside of the tire thoroughly when changing a tube. I give the tires five stars, and zero stars to those drivers whose uncovered and unsecured loads litter the roads with metallic debris. I check the tires after every ride and often pull out thorns and tiny bits of junk that get stuck in the rubber but don't make it all the way through to cause a flat.