The WindBib™ features a silicone double coated, 1.1 oz. polyester, Ripstop fabric, coated with a silicone, windproof and waterproof, layer on each side. The main panel protects the neck, chest, mid-section and body sides plus, there are two flaps to protect the shoulders. The adjustable and quick release collar is lined with a soft wicking and insulating fabric. A hook & loop closure provides an adjustable fit, XS - XL (14"-17" neck size).