The Expedition 100 is a highly concentrated insect repellent which contains DEET Scientific research demonstrates that DEET repels biting insects effectively The repellent effect of LIfesystems Expedition 100 can last several days when sprayed on cotton or wool fabrics or several hours when applied to skin Lifesystems Expedition 100 is maximum strength & provides long lasting protection against biting insects ranging from gnats to mosquitoes to fleas & ticks Please note we cannot ship this product overseas