Yes, right, Michelin.

Like I said, I find I get slower leaks if the small size of the range for tubes is the same as the tire size. So, the 35-47 should be fine in a 35 tire. In fact, I think I put mine in 32mm tires that I sent north.

With careful installation, I don't find large vs small tubes make much difference, as long as one doesn't get too oversized.

The idea is to hopefully reduce the actual number of flats. I suppose it depends a bit on frequency and type of flats that one gets. I try to always be prepared, but it is close to 1000 miles or so per flat (which does go pretty quickly). And, of course, they don't always come evenly distributed.

I'm hoping those Proteks will be good for Goatheads, Blackberry thorns, Radial Tire wires, and small bits of glass.