I recently returned for a CO elk hunt where we hunted in a foot or more of snow. For the trip I picked up a pair of Gore-Tex Upland Field Pants from LL Bean to replace a pair of rain pants. They are light weight compared to other hunting pants and, after washing, were not any more noisy than my other pants. They are also briar-proof and proved to be waterproof even when sitting in snow for an hour or so at a time. Best $139 I've spent on hunting clothing.
