mesh Imported Mosquito head net treated with Insect Shield permethrin Multi-filament polyester mesh is soft, comfortable and affords high visibility Very fine hexagonal mesh with 500 holes per square inch provides maximum airflow but keeps bugs out Elasticized draw cord closure ensures optimum fit Wide enough to accommodate a hat (not included), stores compactly in included stuff sack 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.