Bug Proof DEET Insect Repellent Spray contains 50% DEET and it is intended for use in higher risk areas where insect bourne diseases are a real threat. It is serious stuff for serious conditions, and hence it isn't recommended for casual use, children under 10 or mothers to be. Supplied in a 100ml plastic bottle with a pump action spray. Usage guidelines: - normal conditions - reapply every 4 to 6 hours - typically, one bottle would provide protection for one person for about two weeks. - humid conditions or strenuous exercise (lots of sweating!) - reapply every 2 or 3 hours - typically, one bottle can provide protection for one person for about a week.