A new combination of repellent with camouflage face paint was evaluated on volunteers against the mosquitoes Aedes aegypti (L.) and Anopheles stephensi (Liston) in an environmental chamber under three climatic regimens: tropical open, tropical forested, and hot dry environments. The duration of protection varied significantly among different climates. The camouflage face paint with diethylmethylbenzamide (deet) provided 95% protection from mosquitoes for 4 h, except under tropical open climate, where it provided only 2 h protection.