Bought these for daughter and her husband because we are enjoying ours so much. Great product. Good price.
This product does exsactly what it was marketed and sold to do, yes your undershirt will get a little damp, but it allows me to where a all seasons dkar jacket (thermolite liner removed) durring july in the Texas heat, reasonably comfortable, ie as long as im not sitting still.
There have been no questions asked about the Fly Racing Cooling Vest.