When the bugs are thick, wearing a head net is the answer. Sea To Summit's Mosquito Head Net with Insect Shield provides Insect Shield treatment with a built in invisible odorless insect protection that repels mosquitoes, ticks, fleas and flies. The active ingredient is a man made version of a natural insect repellent found in certain types of chrysanthemum plants. Products containing Insect Shield can not be shipped to Canada. Black mesh netting offers better visibility than white mesh Fine, 500 hole per square inch hexagonal mesh Made of a soft multifilament polyester Packaged in its own tiny stuff sack Elasticized draw cord closure Wide enough to wear with a hat or without Insect Shield Permethrin treated model Weight: 1.3 oz.