The Kari Traa Sjølvsagt Set is a functional long sleeve top and bottom base layer combo with an upbeat, trendy look. The garments are made from polyester fabric that fits tightly and wicks away moisture fast. It has flatlock seams to prevent chafing and a one panel underarm construction. A snug fit with 4-way stretch allows for total freedom of movement. They keep you feeling fresh and comfortable during high-energy activities in the cold.