Expedition Endurance insect repellent contains a specially formulated time-release agent enabling DEET to evaporate at a slower, constant rate. This makes it possible to provide effective protection which lasts longer than standard repellents whilst actually using a lower concentration of DEET. Each application of this DEET spray will last for up to 12 hours and suitable for use on children over 2 years. Re-application may be required in areas with high temperature and humidity.