Da Brim has one of the largest brims of all the hats we tested, ranging from 3.5 inches in the front to 5 inches in the back. The catch is that it's made to be worn over a helmet, and when you don't wear a helmet it's like a loose-fitting, full-brimmed visor with the top of your head completely exposed. It does come with a UPF rating of 50+ so it will block about 99 percent of all UV radiation, but that rating is only for the brim. So if you are wearing a helmet underneath, then be aware that the sun could come through the vents in the helmet, thus harming your skin.
Da Brim is made to be worn over a helmet, so the comfort of it depends a lot on the helmet you are wearing. However, we did notice that it can easily be blown off in the wind when it's on a helmet or if you are just wearing it as a visor. When worn over a helmet it is fairly secure and comes with a Velcro strap on the back that attaches to your helmet, so that if it does fall off it hangs on the back of your head. The first time we tested Da Brim we were rock climbing in Tahoe and on the second pitch of the climb Da Brim flew off and sailed all the way to the ground because we forgot to tighten it all the way and attach the Velcro strap to the helmet. Da brim has a rubber liner that helps it stick to the outside of a helmet as well as a strap in the back for tightening.
This totally depends on the helmet you are wearing, unless you aren't wearing a helmet and then your head can breath freely. Keep in mind that the darker color hat you wear, the hotter it will get.
Da Brim is fairly durable and the fabric is very strong. The only problem we had was when we were doing our 30-minute crush test. When we were crushing it we had to bend the brim, and the force of that made the outer frame of the brim pop out of the stitching. The hat still works fine, but every now and then we accidentally poke ourselves because of it. This can easily be fixed by trimming off the excess piece and then taping it.
