I agree with LT... lightweight and breathable. However, I've had mine for three years and wear them in all weather. With the correct base layers they are wonderfully functional. I do have to admit that since I've acquired my KUIU Attack Pants my Kanabs don't see much action. Mainly this is a fit issue. I've got tree trunks for thighs and the two piece leg on the Kanab rides up and pinches me about mid-thigh. It is annoying that said, these are great pants, quiet, warm for weight, and very functional! Good luck.