Good summer base layerThis shirt is quite comfortable and feels very light. One surprising (to me) aspect is that the shirt is rather short at the bottom hem; however, I discovered that it works rather nicely that way, fitting into bib shorts without having excess material bunched up at your waist or hips.
I used it for the first time today with the temperature at 90F with 83% humidity. The shirt works most effectively when it is exposed to the wind. It felt like it was cooling my core more quickly than when my skin is uncovered. When I completed my ride and removed my jersey, the base layer continued to enable me to cool down more rapidly than without it. I hand washed it and it dried very quickly. I look forward to using it in a few days on a metric century. The forecast is (again) hot and humid. This base layer will help make the day a bit more comfortable.