I bought this jacket specifically for our 3 day trip to Blue Mountain Resort in 31+ deg C weather, with plenty of hours outside in the sun doing various physical activities, and light breeze only. Wore this jacket the entire time, and did not get burned. It was super lightweight, and even though I obviously was sweating during this heat wave, I still considered the jacket very breathable and I was grateful to have it for its UV protection. I found it did not get too smelly, and it washes and dries easily. Light enough to pack for the backpack, and although it does gets wrinkled up in the backpack, after a while of wearing it the wrinkles are no longer an issue. Highly recommended to all!