FIT AND DESIGN: Long sleeve heavyweight baselayer with a performance fit 4-way comfort stretchy baselayer to allow for maximum movement Ergonomic seaming Flat locked construction TECHNOLOGY: Omni-Heat™ Reflective breathable lining reflects body heat to retain your warmth Omni-Wick™ pulls moisture away from your body to keep you dry Antimicrobial treatment protects this product from bacterial growth ADDITIONAL DETAILS: Center Back Length: 29"