Breathable, wicking performance and lightweight stretch comfort Just like busy kids, the kids' Burton Lightweight Base Layer Set is designed to stretch, breathe, and dry quickly. It's the technical head-to-toe combo that'll keep your little ripper warm and dry whether they're on the mountain, the playground, or just sitting on the couch. Features: DRYRIDE Ultrawick lightweight knit is highly breathable and ultra-fast wicking to keep kids dry and warm. A regular fit, non-tech look, and a soft hand give them a casual, everyday feel that keeps kids comfy anywhere. Bluesign® approved materials reduce impact on humans and the planet during manufacturing.