I have a few different base layers, Assos, Rapha,
and Craft. This one is perfect for indoor riding, I haven't gotten to use it outdoors yet but I can see how this will perform really well. For indoor riding the mesh weave provides open circulation from the fan and it doesn't feel heavy or tight. I just bought another one. Get this now!
Got this for my husband who is an avid cyclist. He LOVES this base layer in the summer.