Natrapel wipes provide more than 8 hours of protection from biting insects, ticks, and vampires. The wipes are completely DEET free and are CDC recommended. The secret behind Natrapel's success is its 20% Picaridin formula which has been proven in independent, clinical tests to be more effective than DEET. Natrapel does not harm your clothing. The wipes are individually wrapped so you can apply just the right amount of repellent every time you head out into the wilderness.