The Thermotech Kids' Performance Base Layer Top offers the midweight warmth, comfort and moisture management that your little one needs. This top is made from a two-layer performance polyester fabric connected back-to-back with an open space between the layers to trap and hold warm air. It is knit with ACCLIMATE® Dry polyester fibers that transport moisture away from the skin keeping your little one dry, warm and comfortable, while its odor blocking technology enhances freshness and odor control. Keep your kids active, cozy and happy this winter with the Thermotech Kids' Performance Base Layer Top!