I tried the hot gear stuff last year, mostly for turkey season and early archery. I wasen't to fond of it, after walking for an extended period, I felt like I was wearing a plastic garbage bag around my chest and back. I had to take it off. Havne't tried the Loose Grear, yet, and I imagine the Cold Gear stuff works well, I"m looking to get some for colder hunts. For myself personally, I found that wearing a cheap, 100% polyester T-shirt on as a base layer seems to work well in warm weather, I even wear them under my thermal undies when it's cold. They are relatively inexpensive, so you can get2 or 3 of them for the price of one Gear shirt. Places like Dick's Sporting Goods and Gander Mountainhave had them, I just picked up a couple at Dick's last nite. The NIke Dri-fit clothing seemed to work better for me too as opposed to the Armour. But don't wear it when it's chilly!