Sierra Says: This thermal bottom is ideal for the days when you need a warm, waterproof layer to keep you jonesin' in the gnarliest of conditions. Burton Says: Our Warmest First Layer.

Sierra Says: The perfect remedy for Armageddon-like temperatures, this top is not only uber warm but also very breathable. Burton Says: Our Warmest First Layer.

Sierra Says: These fleece pants are awesome to keep your lower-half happy and dry on colder days. Sport 'em under your snowboard pants or wear them around the cabin, everything is fair game with these toasty trousers. Burton Says: Sweatpants on Steroids.