The Columbia Women's Midweight Thermal Long Sleeve Baselayer Top is made using Omni-Wick™ technology which wicks sweat away from your skin to keep you feeling dry and comfortable whilst the antimicrobial properties will prevent the growth of odour-causing bacteria so you stay feeling fresh. With Omni-Heat™ reflective lining which retains heat and keeps you dry the top also has a four-way stretch construction and ergonomic seaming for added comfort. - L.M. Features: Columbia Women's Midweight Thermal Long Sleeve Baselayer Top Omni-Wick™ technology wicks moisture away from your skin Antimicrobial properties prevent the growth of odour-causing bacteria Designed to keep you feeling dry and fresh Omni-Heat™ reflective lining which retains heat and keeps you dry 4-way stretch fabric construction Ergonomic seams