The Marathon is a line of tires. There are the Marathon, Marathon Plus, Marathon Supreme, and more. Do some research.

I'm mostly a Panaracer man, myself. I like Continental and Vittoria tires, too.

I do understand that Schwalbe has made some breakthroughs in making tires more puncture resistant while keeping the ride quality sacrifice minimal, and that's impressive, but I am not very interested in those compromises. I'd rather have a good quality ride and fix my occasional punctures. I'm good enough at fixing flats, and it doesn't take me long.

A friend of mine says the Marathon Supreme particularly impressed him. I think it's their Marathon model with less puncture protection and better ride quality.