SIZE: Adjustable size fits most, head circumference 22.05-22.83inch/56-58cmThe adjustable strap has enough length, which can be widely adjusted. FEATURES: Moisture wicking, comfortable and quick dry polyester mesh construction.Lightweight, durable, smoothy, adjustable, various colors for choose. IDEAR FOR: Running, golfs, tennis, baseball, travel, and any outdoor activities for shade. MATERIAL: Polyester and cotton, thin soft and lightweight material, soft hand feel. Great for your outdoor adventures, workout routines or simply for adding a to your casual outfits.