The Peale PrimaLoft Stitch-Free Baffle Stretch 3/4 Bottom cuts bulk in two separate places. Baffles woven directly into the stretch fabric hold the PrimaLoft fill flat without a quilted layer on top, and the 3/4 length keeps that same insulation clear of the boot cuff instead of bunching against it. A pull-on waistband with a stretch yoke gets it on without a fuss, and full-length 2-way zippers vent heat the moment a climb turns into work. What Our Gearhead(R) Experts Are Saying:"I overheat on the climb before I ever reach the top, so I unzip the full length and step out of these mid-ascent, boots still on. They go right back on at the transition, before the wind on the way down finds that sweat."