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: 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 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.