I wore my Mesquite hat on a 3-days backpacking trek from Navajo Mountain, Utah to the Rainbow Bridge sandstone arch near Lake Powell. The hat was great! Day time temperatures went into the low 90's; however, the holes in the crown of the hat and brim allowed good air circulation. The hat was also very light. A boat picked us up at the end of the trek and transported us back to the marina in Page, AZ. The only reason I did not give the product 5 stars was because during the boat ride, my hat kept blowing off. I had to rig a chin strap to keep my hat from becoming a part of Lake Powell. After having said that, I really like the hat for the purpose I purchased it. Thank you.