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, interior zippered pocket Port Pocket™ for easy embroidery access Binding at armholes and hem Due to a Tyvek ® inner lining, a silk screen or heat transfer treatment is not recommended for Goldenrod/True Black.