Mosquito Repellent Ben's 30. 100 ml. The active ingredient content of 30% DEET ensures maximum protection against insects. It protects against mosquitoes, ticks, deer flies, and other blood-sucking insects. Effectively repels mosquitoes for up to 5 hours and ticks for up to 5 hours, and can be reapplied every 6 to 8 hours. Do not spray directly on the face and use only outdoors. Not recommended for children under 12 years old and pregnant women.