just got back from a Death Valley National Park trip, these are great! 124 degrees F and I was very comfortable. i wore them up to the(very classy) Inn at Furnace Creek with a nice top. I wore them out hiking during the day and stargazing at night up at the Kilns in Wildrose Canyon. I packed many color tops and these and was ready for whatever, be it Coyotes, birds, or a lovely meal at the Inn.