These pants are nice and lightweight with zero insulation. But they keep you dry. Wearing some thermals underneath make them perfect for cold days, and the side and inseam vents are sweet for super hot days. My only complaint is that they run really long. For sig fit pants they sure are baggy. As long as you have your boots on they are fine, but once you take them off they are draggin on the ground, even with the little tab to hold them up.