a bit 'off topic', but I have been using Specialized Turbo Cotton tyres on my road bike (Giant TCR) for the past few months (700Cx24) .... on my wheels (HED Belgium Plus), they measure just over 27mm wide

amazing tyres that roll fast .... super comfortable, and so far, I have covered 750km on some fairly rough roads .... one puncture from a shard of glass that would have punctured a tractor tyre, and these tyres still look new

I will definately buy these again .... I'm using them with Bontrager Ultra-Lightweight Tubes (not latex, but a lot lighter than normal tubes