What Our Gearhead(R) Experts Are Saying: "I use the Summit AMK Crop Pants under my shell for alpine missions where mobility and breathability are key. They keep my core warm without bunching in my boots, and the side zips make layering super fast."When every ounce and every move counts, we count on the Summit AMK VENTRIX Crop Pant for core warmth and effortless mobility in the alpine. The North Face built this technical midlayer with a cropped cut to eliminate bulk in our boots and VENTRIX insulation for breathable warmth during high-output missions. Strategically placed stretch fabrics enhance range of motion while the low-profile waistband uses FLASHDRY for moisture control. Full-length side zips allow fast on-and-off without removing layers. Plus, NANOREFLECT technology provides subtle warmth retention without adding weight.