The Seirus Performance Fleece Balaclava provides full head, neck and face protection. It can be worn as a neck gator, full face mask, or partial face mask. The four-way stretch gives an excellent fit and is perfect for layering. This fleece is soft and warm but at the same time it is a durable, non-piling material. It wicks away moisture and dries quickly. The Balaclava can be worn 3 ways: 1. with a wide opening over the face (eyes, nose, mouth) 2. with a narrow opening (only eyes exposed) 3. as a neck protector (fold the top down and only cover the neck area). Sizing on these products is somewhat inexact but the best rule of thumb is as follows: XS- children; S/M - big children, small women; L/XL - adults