Expedition 50+ contains DEET & natural pyrethroids in a dual action formulation that provides a high level of protection against biting insects in all environments. DEET acts as an effective repellant & the natural pyrethroids act as a bite inhibitor that discourages the little blighters from actually biting you should they get past the DEET. Each application of Expedition 50+ will last for up to 10 hours, but if its particularly hot & humid & you are sweating you will need to re-apply more frequently. Use sufficient repellent to cover exposed areas of skin For use on your face & neck, spray a small amount on the palm of your hand & rub onto the skin If using in conjunction with sun cream, apply the cream first & allow this to absorb into the skin & then apply the insect repellent Re-apply repellent more often in areas of high humidity or when you perspire a great deal Re-apply after swimming or showering Do not use DEET on any open wounds or rashes Keep DEET out of your eyes, mouth, ears & avoid inhaling it