Women's Heatwave™ Performance Base Layer Bottom Size:XS The Dynamax™ neck tube attaches

The Dynamax™ neck tube attaches under the eyes with a pair of magnets

Wind-sealing Lycra cuff

A band of Heatwave™ lining runs around the base of the beanie to amplify warmth in one of the most notorious heat loss regions of the body

The revolutionary dual heating system found in the Heatwave lining reflects and amplifies your body's heat to produce that warm cozy feeling we all look for in a glove

Women's Heatwave™ Performance Base Layer Bottom Size:XS The Dynamax™ neck tube attaches#1 selling technology in glove liners, now available for your whole body Athletic Fit Engineered Body Map Heatwave For More Warmth & Rapid Wicking Anti Chafing Flatlock Seam Construction Smooth Contrast Waistband for 'Stay Put' Fit & Gusseted Undercarriage for Increased Mobility Reflective Hits on Legs 4 Way Stretch Moisture Control Breathable Heatwave with Integrated Spandex for Improved Stretch, Shape, and Maximum Comfort Ergonomically Placed Max