backwoodsman
Tour Winner
Can only say that in many years of golfing, and hill-walking/mountaineering, and spending a lot of money on kit, the first time I've been properly dry is after I bought GG gear. Nuff sed for me.
I saw a video explaining the the layering techniques that Galvin Green use to keep you warm in the winter but also their summer clothing keeps you cool and dry and allows the perspiration to escape. See the video on this website.
http://www.sheffieldprogolf.co.uk/Golf-Clothing/Galvin-Green-Video
They also sell all the major waterproof brands but in my opinion GG is the best. I think they have a 15% discount deal on up to Easter so maybe worth a look.