Helmet Fit and Comfort The Airoh TR1 just feels small overall, and it has a thin plastic shell and very thin padding, which don’t do much for the cause either. I don’t know why Airoh didn’t scale up ...

There's also the Alto TR1 Plus, which is what's referred to as a “three-season plus” tent. It adds 4 ounces and does away with much of the mesh on the inner wall to deal with colder temperatures.