When I go hiking or biking in the hot Arizona sun, I wear a cool t-shirt over a thin, long-sleeved shirt to protect myself from the sun. When I almost finished my last cooling t-shirt (now sold out) I thought I'd try something different. in September 2020 I decided to give it a try. I was so impressed with the fit, feel and moisture-wicking performance that I now have five, three alternating for hiking and two for cycling. You can buy the same. But knowing it's unlikely, I've now bought additional ones.