Originally posted by awbowman: For the warmer days, I personally like the Core4element that you can get at bargain prices that come up on camofire.com, but lots of good ones out there.IMHO, I would get a 1/4 zip to open up when exerting yourself. You can cool off better if you can open a zipper.Be patient they come up fairly often on camofire.com. Right now they have the mid-weight ones that would give you an idea of the product. I personally wear two lighter weight ones when it get cold instead of getting the mid to heavy weights.