1 1/4 ounces. Maximum protection. 100% deet. Up to 10 hours of protection. Protects from mosquitoes, ticks, black flies, deer flies, chiggers, fleas, stable flies, insects. Insect repellents greatest benefit is in repelling disease-bearing insects, like deer ticks that can transmit Lyme disease, and mosquitoes that can transmit encephalitis and West Nile virus. It also benefits those exposed to insects that might be carrying malaria, dengue fever and other diseases. Great for both outdoor and indoor activities including camping, fishing, BBQ, hiking, and much much more. Bens 100 insect repellent spray pump.