The Insect Shield Sport crew Sock offers built-in, odourless and effective protection. It is machine washable and no special care is required, just do not dry clean, it removes the active ingredients. Repellency lasts for the lifetime of the product, which is 70 washes. Repels mosquitoes, ticks, ants, flies, chiggers and midges (including those that can carry dangerous diseases such as Lyme, malaria, Dengue fever and Zika virus). Insect Shield Repellent Apparel and Gear are revolutionary products designed to provide long-lasting, effective and convenient personal insect protection. The durable protection is the result of years of research and testing. In July 2003 Insect Shield Repellent Apparel was registered with the Environmental Protection Agency.