Keep your family protected from pesky mosquitoes with these safe and effective, stick-on, fabric patches. They use natural essential oils to create a protective barrier that repels mosquitoes without the use of harsh chemicals. Simply attach to your clothing or accessories and enjoy your outdoor activities. Each patch provides 72 hours of protection and leaves no residue behind. Polyester, viscose and all-natural citronella. Patches are 2 1/2"Dia. Set of 102 patches comes in resealable bags, keeping them fresh.