Used mine on a 255 miles hike from Lucca to Rome in Italy in June/July. Most days with temperatures between 30-39 degrees Celsius (86-102 degrees Fahrenheit).
The hat had a great fit, and my head never got unpleasantly hot during the hiking (and it kept the sweat out of my eyes also :-) ). I used the sun shield (neck shield) in the afternoon when the sun got low on the horizon, which was a bonus (no sunburn).
I highly recommend this hat for hiking in warmer climates.
Hat is high quality and functionally awesome for keeping the sun off you. Head stays cool with the vents at the top of the hat and it is very comfortable.
I had some stitching come out from the inside of the headband and their customer service was fast, responsive and got me a replacement.
Fits great! Looks great!
Just as it promised. On my head for the past 6 months - it was there on Sailing, high up in the mountains and of course every day use. Excellent quality, size fits. I recommend.
It's comfortable and will sheild me from the hot sun!