Petra is a jacket designed for movement during active, warm days. Water repellent finish to keep you dry if there is a light drizzle on your day outdoors, and pockets with easy access when you carry your backpack for an all-day hike. There are no seams under the arms for comfort and to avoid chafing. Made of mechanical stretch Sorona® fabric that has a smooth inside. Bio-based Sorona® polymer is made from 37% plant-based ingredients (oil derived from corn blast). Sorona® polymer has Class 1 certification from the OEKO-TEX Standard 100.