"The Patagonia Storm Shift Insulated Pant is built for full storm days when conditions stay relentless from first chair to last, the kind of day where warmth and waterproofing have to work together without compromise. On those days, the stretch taffeta lining moves through variable terrain while the outer-thigh and inner-thigh zip vents shed heat on the skin track without cracking the shell. What Our Gearhead® Experts Are Saying:""I trust these on the days when the storm doesn't let up. The Thermogreen insulation holds warmth without adding bulk under a shell layer."""