Connectyle Summer Quick Drying Mesh Sun Cap Lightweight Outdoor Sports Hat Breathable Sun Runner Cap, 55 60cm, Black Lightweight & quick drying polyester One size fits most by 55-58.5cm head girth with adjustable Hook & Loop closure at back Crushable , Packable Mesh panels on both sides for breathability keep you cool Ideal for runners, golfers, tennis players, and any indoor or outdoor activities