Just tried this out on a two night hike through the southern section of the Grampians in 20-24 degrees heat and am very impressed with the quality, air wicking and breath ability of the material. It didn’t stink after literally soaking it with sweat in the sun for 3 days of walking, and the loose fit doesn’t make you feel claustrophobic wearing long sleeves in warm weather. No sunburn whatsoever through the fabric either. Absolutely love it, want about fifty of them now.