Made of fine mesh and designed to keep out all sorts of flying insects, like mosquitoes, flies, bees, gnats and more. Keep nasty critters at bay by the fine no-see-um mesh. Fine mesh stops bugs of any size, from flies, mosquitos and midges to no-see-ums and gnats. Flick 'em and enjoy the rest of the day. The black fly head net over hat can keep your face,neck,head,ears and eyes off ,during the hiking,fishing,walking and the other outdoor activities,you can enjoy your outdoor activities all the way when you wear it. Very lightweight fabric, refreshing and breathable. The holes in the mesh are small enough to resist small insects while not obstructing your view . 1. Open it for a while before you wear it, because it may have a little fabric smell when it get out from package. 2. This head net can wear directly, it would be better wear it with a hat with edge, which will help a lot.