Buckle closure. There is a button on back side of the hat.Size: adjustable size for 55-59cm.Comfortable and breathable material: The caps are great quality, made of cotton and mesh, soft, lightweight, durable, breathable, bring you a comfortable wearing experience. It is very suitable for Spring and Summer. Buckle closure: Adjustable back closure fits small and large heads.Snug deep enough fitting covering all heads just right. The rear opening design fits women's ponytail comfortably. Also fits for men and teenagers, great idea for Mother's Day, Father's Day, birthday, Christmas gift for your family and friends.Fashionable and stylish sun protection: Classic style for any season and wear. The baseball cap protects your skin from harmful ultraviolet rays. Great for running, fishing, floating, hiking, biking, walking, garden work and daily wear, traveling, baseball games, and more Vintage washed distressed cotton dad hat, criss cross hat women baseball cap, distressed ponytail messy bun trucker pony cap, trucker mesh sun hat, criss cross pony cap, washed dad Hat, plain baseball cap, washed plain baseball cap, messy bun trucker pony cap,choose the right style you need.