Built with SmartWool's Next-To-Skin fabric, the SmartWool NTS Lightweight Bottoms for Boys are the ideal way to start your layering system when you necessity four-season versatility and love cool weather activities. With an elastic waist band and custom fit, the NTS Microweight Bottoms are moisture wicking, temperature regulating and odor resistant, and feature flatlock seam construction for all-day chafe-free comfort.