Insect Shield scarves are made from premethrin-treated material. The effective, odorless repellency provided by Insect Shield apparel is EPA registered to last through 70 washings—beyond the lifetime of most garments. Insect Shield Repellent Apparel products are U.S. EPA registered to repel mosquitoes, ticks, ants, flies, chiggers, and midges (no-see-ums). At the beach, at the ballpark, around town or around your family, the Insect Shield summer scarf offers versatile protection from insects wherever you go, and however, you choose to wear it, or use it! Customers who have bought them from Canvasworks+ have reported back that they really do work!