BioShield uses only natural ingredients in its line of insect repellent products. The spray, hair and body wash and detergent kill mosquitoes, ticks, bed bugs and fleas. The 16-oz. spray can be used on pet bedding while detergent can be used to wash pets. The main ingredient in BioShield products is geraniol, a plant oil extracted from geraniums, lemongrass and other species. It has a pleasant odor and low toxicity in addition to being highly effective.