DEET is an insect repellent material which can be applied to the skin. DEET is the agent with the best performance and the longest protection. By virtually all mosquito gene, flying insects and ticks this insect repellent has been shown to be effective. Ideally suited for when you are traveling to a country where malaria and dengue. The percentage of DEET has nothing to do with the fact that one will work better than others. The percentage refers only to the duration. The higher the percentage, the longer the DEET is effective. This variant is carried out in a spreadable gel with 27% DEET, and is operative for 8-12 hours.