After learning new Schwalbe Marathon Green Guards require wax on the inner walls to replace my Conti Top Contacts I was psyched. I’ve read about them for years. Chain Reaction had a good price $30 US each delivered, 700x32. There’s a 5mm protection layer. On my second ride I thought about ditching my pump.

Well Murphy’s Law struck and I ran over a roofing? nail 7-8mm just off center.
Lesson learned- carry your patch kit. **** happens.