Created with a refined, focused design to maximize its versatility, the Kyanite shines as a midlayer or standalone, and delivers performance across a range of activities. Combining warmth, mobility, and moisture management, Polartec® Power Stretch® Pro allows airflow for thermal regulation and has an abrasion-resistant nylon face for durability. Four-way stretch combines with articulated patterning and gusseted underarms for superior freedom of movement, and the fit layers easily under a shell.