The Burton ak Cyclic GORE-TEX 2L bib pants pair full waterproof, windproof protection with venting built for the effort of climbing a bootpack or pushing through deep snow. Articulated patterning through the legs and seat lets the fabric move naturally instead of fighting the body, so full bib coverage doesn't come at the cost of range of motion. What Our Gearhead(R) Experts Are Saying:"I've hiked bootpacks in these expecting to overheat under full GORE-TEX, and the inner thigh vents dump enough heat that I never reach for the zipper on the way up. The waterproofing never lets up either, even sitting straight down in wet snow to strap in."