The size of its pores is only 1.0 mm! Weighing only 0.7 ounces, this headband is easy to pack and very portable, as it comes with a zipper bag for safe storage. Designed for easy use, Ben's InvisiNet has a loose fit and an elastic crown that stays in place on your favorite head, fishing cap or baseball cap. The drop collar design protects you while allowing ventilation of shirts and jackets without closure in hot weather. Do not let midges, mosquitoes or black flies stop you from contemplating the landscape. With Benvis InvisiNet Head Net, there is no need to put a dark screen between you and nature.