Insulation: It is insulated with ThermoBallâ„¢ Eco, a synthetic insulation made from 100% post-consumer recycled polyester. This insulation is designed to provide warmth even when wet. Features: The vest is known for being lightweight, durable, and packable. It is also water-repellent and wind-resistant. Some models have a slim fit and can be stowed into their own pocket for easy portability. Materials: The vest is made with 100% recycled fabrics and fill. Size: The size indicated on the tag is XL (TG).