The Sea to Summit Mosquito Head Net with Permethrin is treated with Insect Shield permethrin. Features a soft, multi-filament polyester mesh that is comfortable and affords high visibility. A very fine hexagonal mesh with 500 holes per square inch provides maximum airflow while keeping bugs out. Elasticized draw cord closure ensures optimum fit. Wear with or without a hat. Stores compactly in included stuff sack. 50D multifilament polyester. Weight 1.3 ounces.