Tick & Mosquito Repelling Unisex Vest Fabric is treated with Permethrin when woven. Resulting fabric is insoluble. Registered with EPA and recommended by CDC to protect against insect borne illnesses Made in USA Machine Washable Sizing: : small child, Sm: 100-130lbs, Med: 130-160lbs, Large: 160 -190lbs, : 190-220lbs, XXL: 220-260lbs