Keep him prepared for when the temperature drops with Athletic Works boys' warm thermal bottom. Made with DRI-MORE wicking technology, a brushed fabric for added warmth, and non-chafing flatlock seams, these bottoms are easy to layer under jeans or joggers. They feature an elasticized waistband and a stretch fit for easy movement. Complete his look for long hours spent outside with the warm thermal top to layer under his popovers.