The Lifesystems Expedition 100+ Plus is a dual action, high strength formula that combines the effective repellent action of DEET that wards off insects, and the insecticidal action of natural pyrethoids that help prevent insects which land on your skin from biting. Each application of Expedition 100+ Plus will last up to 10 hours, however high humidity can lead to excess sweating and a slightly reduced time on the skin. Not suitable for children.