A waterproof-breathable Omni-Tech membrane is the backbone of the Columbia Bugaboo IV Fleece Interchange Jacket, sealing out wind and snow while a silver dot lining reflects heat back at you on the coldest chairlift rides. Zip in the fleece liner underneath for full warmth on a deep-freeze morning, or wear either piece alone once the day warms up. The fleece itself carries a water-repellent finish, so it keeps performing even after the shell comes off. What Our Gearhead® Experts Are Saying:"I left the house in full interchange mode for a cold first chair, then peeled off the shell by midday when the sun came out and just kept riding in the fleece liner. It handled both halves of the day like they were two completely different jackets."