Use Environmental Protection Agency (EPA)-registered repellents and wear loose long-sleeved shirts, and pants that are light-colored. When using, or purchasing, EPA-registered repellents, look for the active ingredients DEET, picaridin, IR3535, oil of lemon eucalyptus (OLE), or para-menthane-diol (PMD). Look for these active ingredients at 20% or above. Click here for more information about EPA-registered repellents.