Craft designed its Active Extreme Long Sleeve Crew Base Layer to be the perfect first layer for working out in fair to cold conditions. While the term "extreme" might be slightly misleading, the top was intended to be worn during temperatures ranging from around 25 to 55 degrees Fahrenheit. As one of the most versatile layers in Craft"s base layer collection, the Active Extreme was constructed using a thin, lightweight, and elastic micro polyester. This breathable fabric was channel-stitched using a combination of two technical fibers. The first is an exceptionally soft "hexa-channeled" fiber blend that rests against your skin, which begins the process of pulling moisture away from your body. This blend of fibers works in conjunction with the hollow fibers on the outer layer, providing insulation to your core and aiding in moving that moisture to the next layer. These materials work together to keep your body cool, dry, comfortable, and smelling fresh throughout your most intense training sessions. The highly elastic fabrics used to construct the Active Extreme provide a smooth anatomic fit that moves with you underneath your additional clothing layers. The panels were joined using curved flatlock seams to eliminate abrasion and friction. Contrasting stitching lines the top"s right shoulder, and subtle logos adorn the neck and sleeve. The Craft Active Extreme Long Sleeve Women"s Crew Base Layer is available in sizes X-Small to X-Large and in the colors Black/red, Laser, Vision, and White/red.