This classic cold weather essential has been updated for a more comfortable fit and feel. It is soft and comfortable for all day wear and flat seams for comfort. The durable material provides you with shrinkage control for a great fit even after washing. The fresh IQ technology controls odor for all day freshness and the X-Temp technology helps to maintain your body temperature. It is designed to fit snuggly for comfort under clothing. Consider ordering one size larger if you prefer a looser fit.