I have worn mine regularly for over twenty years. It is great at keeping the rain away, but does get toasty in really warm conditions. OR makes the same configuration in lighter fabrics, calling it the Sonora Sombrero. That model is even more versatile, since it will keep away a reasonable amount of rain, as well as providing comfortable shade in hot conditions.

Both models work well as pillow components, rappel padding, dog watering dishes, etc.