I ride about 6-7 hours in and outside. I do a lot of trainer rides in my home with NO FAN nor A/C. Another words, I sweat, a lot. After about an hour I could tell the shirt was soaked, but something I noticed, I was cooling off .... quickly, I even got a chill. Most of the time I just wear a cotton or a tech shirt inside and with those it's like wearing a wet blanket, NOT DeSoto Skin Cooler!!! If you sweat, and it's hot where you live, I KNOW this will keep you cool. The material is very comfortable, heck the zipper even has a cover at the bottom (so you don't get chafed). There are 3 pockets in the rear as well. The shirt is long enough to cover your back side for when you lean down in aero. I was able to wear this shirt for 7 hours sweating, and I live Mississippi. VERY HUMID. My new favorite bike top!Most comfortable shirt I've bought so far. Ended up buying 2 other styles, same brand due to how versatile/comfortable they fit and feel. They dry very quickly out of the water, and definitely don't feel overheated while wearing. They work really well as a cycling jersey too. They do run a little small, and ride up just a little bit. No biggie though.Great fit and keeps you cool.The zipper irritated my neck and skin during my race. I’ve never had issues with other brands or similar products.Love these kits. This is my second one and done a few half Ironmans in each of them.The zipper broke on the first try. This is the second time this has happened to me on a Desoto full zip jersey. It’s a cheap plastic zipper. Perhaps they should consider a higher quality zipper supplier for such an expensive product.Like a second skin. Perfect.