A dual-action formula which combines natural pyrethroids with a very high concentration of DEET to provide maximum, long lasting protection. Natural pyrethroids act as a contact repellent so any insect actually landing on the skin will be detered from biting. Each application of Expedition 100+ Plus will last over 10 hours - high humidity can lead to excess sweating and a slightly reduced time on the skin. Not suitable for children. Ideal for using on cotton clothing, sweat bands or socks to help protect the user.