The Columbia Sportswear Boy's Dotswarm Omni Heat Full Zip Fleece Jacket provides extreme warmth in a lightweight package. Built to keep him perfectly warm during activities in cool weather conditions, this technical full zip fleece features an Omni Heat reflective lining that adds cold fighting power to the MTR fleece's cozy warmth. Zip closed pockets provide secure storage. Omni Heat Thermal Reflective Make Your Own Heat Thermal Comfort. This thermal reflective dot lining regulates your temperature, using space blanket technology to reflect, trap and retain your body heat, while maintaining a high level of breathability and interior airflow, to disperse moisture and excess heat, keeping you comfortable. Boosts heat retention by 20% on average, and the metallic nature neutralizes static buildup. Constructed of 100% polyester Dotswarm MTR fleece Omni Heat thermal reflective Zip closed hand pockets Modern Classic fit Avg. length: 20.5 in. Import.