For climbing and other outdoor helmets.
The brim comes sized to fit the smallest helmets.
Try stretching it over the helmet.
This photo shows the need to enlarge the opening.
A good fit would leave about 1/4 to 1/3 of an inch up the sides of the helmet to provide a good seal so the brim stays in place in wind and cold temperatures.
Turn the Brim upside down so the label shows.
Do not trim over the label, it reinforces the stitching of the brim.
Trim only 1/4 inch at a time. It is easy to overdo it.
Trim off 1/4 inch all the way around, tapering off as you get to the label in back.
Try it on again. Trim another 1/4 inch if needed.
The brim should stay on without need for glue etc. but can be removed.
The original climbing helmet brim. Flexible, keeps rain and sun off face and neck.