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REI Lightweight Polartec Power Dry Long Underwear Bottoms - Men's

The REI Lightweight Polartec(R) Power Dry(R) long underwear bottoms are an excellent performance insulation layer for aerobic activities in cold weather. Polartec Power Dry utilizes 2 different yarns on either side of the fabric to enhance comfort: interior yarn wicks moisture, and exterior yarn dries quickly. The combination of the 2 yarns helps keep you dry during highly aerobic activities because it moves moisture away from skin faster than single-component fabrics such as cotton. Flatseam construction is soft and non-chafing next to skin. Brushed elastic waistband ensures a comfortable fit outing after outing. Next-to-skin fit hugs the body, maintaining skin contact to boost fabric performance.