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 Expedition Endurance will last for up to 12 hours. Re-application may be required in areas with high temperature and humidity.   Features: 34% or 20% DEET with time release agent Cream or Aluminium Pump Spray Effective for up to 12 hours Repels mosquitoes, midges, horseflies, sandflies, gnats, fleas, ticks and other biting insects Ideal for jungle treks, long haul trips and high risk malarial areas   We say - DEET is proven to be the best repellent against mosquitoes available. This comes in different strengths and the higher the percentage, the more effective it is and the longer it lasts. The most popular strength is 50% DEET but we recommend you get one with a bite inhibitor (PLUS +) DEET can damage plastics, lacquers etc. The Health and Safety Executive has deemed it safe for use on the skin but it can be harmful in contact with eyes or mouth.