The whole concept makes no sense to me. The reason for wearing a mesh undergarment in the cold is to have a layer of warmer air next to your skin, rather than the colder next layer. But in warm weather you want the wicking/evaporating layer touching your body. You don't see pros wearing them because they don't want to be any hotter on hot days.

Cynics, of course, will say nobody's paying them to wear base layers.