The versatile Challenger Vest has spandex-trimmed armholes and hem for long-wearing durability. Teklon nylon shell Heavyweight fleece lining for extra warmth Double-needle stitching throughout Slash zippered pockets Port Pocket for easy embroidery access Binding at armholes and hemDue to a Tyvek inner lining a silk screen or heat transfer treatment is not recommended for Goldenrod/True Black.