?Extra fine mesh?: 522 holes per square inch/ 81 holes per sq cm, keeps the bugs and insects out but allows fresh air in. ?Great protection?: Protect you from the mosquitos, bugs, flies, other insects, good tool for tropical traveling and outdoor activities. ?Widely Used?: It is a good tool to enjoy outdoor activities, such as fishing at night, hiking, camping, traveling, cycling and gardening. ?Reliable quality?: Our mosquito head net is made of sturdy fabric, soft, stretchy and strong for durability and resistance against bursting. ?Perfect size?: Approx 21.3 inch/ 54 cm in height, bottom perimeter is 37.8 inch/ 96 cm, fits comfortable over any adult and child size hats.