Mosquitoes, beyond being annoying, carry all sorts of bad things with them. Be prepared with Insect Sheild. Insect Shield® repellent apparel provides long-lasting, effective and convenient personal insect protection. The active ingredient in Insect Shield® is so tightly bonded to the fabric fibers that it retains effective repellency throughout the lifetime of the product. This is well beyond the lifecycle of most other products on the market, Insect Sheild works for 70+ washes.