Sierra says: The Betsey Layer Top acts as a great base layer to help protect against sweat and moisture coming in and still allows it to go out so that your body can breathe. It also comes with a built in bra.

Sierra says: The women's 686 Betsey Layer Bottom goes great with the top to provide your body with full protection throughout the day. The bottom goes down a little below the knees for a perfect length so that you're socks can come up and just barely go over them and you don't get any bunching in your boots.

Sierra says: This unique looking 686 Cubic Riding Jersey will be a great base layer to go under your jacket. With the thermal technology provided, it gives you a performance dry fabric that wicks away moisture and SPF 30 built right into the shirt. The technology also protects against odor and wicks away perspiration throughout the day.

Sierra says: The Direct Bottom Layer goes great underneath any snow pant to provide an all day guard against odor and perspiration.

Sierra says: The Direct Layer Top comes in simple plaid prints or solid colors and is comfortable and sleek. It has a crew neck and a slender fit, and also comes with performance dry material and SPF 30 to protect you all day long.

Sierra says: The Esse Riding Jersey adds some flavor into your base layer with a unique and diverse design on it and a zip up crew neck. It provides all day protection against odor and sweat.

Sierra says: Pull on the lightweight 686 Women's Modern Support Top under your mid-layer and stay warm on frigid pow days. This scoop-neck long underwear top features a built-in support liner for comfort in motion, thumbholes for maximum warmth, and flatlock seams for easy layering. Embroidered accents and contrast stitching separate the Modern Support Top from your boring long-sleeve thermal...

Sierra says: This Sienna Riding Jersey is a simple and fun product from the women's thermal technology line of 686. The zip-up hoodie has a soft performance dry material and includes a unique six eight six design on the sleeve and left shoulder. It's perfect to wear underneath something as a base layer or mid layer or just when you're hanging out. It also helps prevent odor from oc...

Sierra says: The Ziggy Riding Jersey is another great first layer, which is definitely a must-have when you're riding! The Ziggy has a cool zig-zag pattern with a 3-snap up polo collar. It keeps you warm and allows your skin to breathe all day long.

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: This fleece is quick-drying and highly breathable. Stretch 360 for unlimited mobility and stink-proof antimicrobial finish. 1/4 Zip venting with super soft zipper guard at chin. Burton says: For the double-digit sub-zero 20 minute life ride.

Sierra says: The ultimate winter warrior.

Sierra says: Quick-drying and highly breathable with DRYRIDE ultrawick stretch microfleece. Softlock seams for comfort and softwaist logo elastic waistband. Burton says: Packs more heat than Chuck Norris with a sunburn.

Olympic retro meets new-school high performance

Sierra says: Who doesn't love polka dots?? The Burton Lightweight Henley Thermal comes with the cute and accessible button down design.

Sierra says: Double-knit closed cell mesh fabric with quick-drying and highly breathability. Stink proof antimicrobial finish and chafe-free softlock seams for comfort. Softwaist logo elastic waistband is ideal for year-round outdoor activity. Burton says: Roast beef, not nuts.

Sierra says: Double-knit closed cell mesh fabric with quick-drying and highly breathable fabric. Strap in without your shirt un-tucking. Ribbed cuffs and collar, ideal for year-round outdoor activity. Burton says: Dry is fly.

Sierra says: Double-knit closed cell mesh fabric with quick-drying and highly breathability. Stink proof antimicrobial finish and chafe-free softlock seams for comfort. Softwaist logo elastic waistband is ideal for year-round outdoor activity. Burton says: The ankle itch eliminator.

Sierra says: Core comfort with a little bit of glam and style. The Burton Lightweight women's thermal crew comes in a fun and intricate design that will provide you with dryness and comfort all day long.

Sierra says: Breathe easy with the Burton Lightweight women's thermal crew. Comes in fun and colorful designs that allow you to stay warm and dry no matter what the conditions.

Sierra says: Comes in a very fun and cute tropical brass cupcakes print and true black tidal wave print. Either way you can have a lot of fun in these layers. These truly are the frosting on top of the cupcake. Burton says: Kiss pit puddles goodbye.

Sierra says: 180 degrees of unlimited mobility and a shorter inseam so that there's no worries of being the slightest uncomfortable all day long while you're tearing up the mountain. Comes in tropical brass cupcakes and true black tidal wave print. Burton says: Ready to rock, from the park to the dance floor.