One size fits most adults 50+ UV protection Angled front and back panel This ZANheadgear SportFlex Series Neck Gaiter features a soft yet, durable stretchy shell lined with warm and super soft cozy fleece on the inside and SportFlex fabrication on the outside. This still includes comfort and 50+ UV protection. The Neck Gaiter also sports a contoured cut that fits over your shoulders without bunching and its angled front and back panel allows for extra neck coverage. One size fits most.