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.