These insect repellent bracelets protect you against mosquitoes all summer long. One bracelet protects at least 20 days long against mosquitoes and other insects. These bracelets are so discreet no one can even see or smell that you are wearing an anti-mosquito bracelet!The innovative Nano-Tech Bracelets protect you against all mosquitoes and a lot of other dangerous insects, like malaria mosquitos and sand flies.