Along with my Echo top, this hat was amazing for keeping me cool and my face and neck protected from the sun on a 5-day backpacking trip through the Grand Canyon in blazing hot temperatures. I especially like how flexible it was - I was able to fold down the back of the rim so it wouldn't hit my backpack, yet still protect the back of my neck. It is a light and comfortable hat that just felt like it became part of me. I really like that it comes in two sizes. The S/M fit my rather small head really well (a lot of hats are too big on me).