10-Hour Insect Repellent from Tec Labs contains the highest percent of DEET (N, N-diethyl-meta-toluamide) available in an insect repellent. The 100% DEET formulation lasts 10-12 hours with one application, has no scent and is formulated to not sweat off. The compact, 2-oz. non-aerosol pump spray bottle fits into a shirt pocket or first-aid kit. Free sample is available.Tec Laboratories Inc., www.teclabsinc.com, 1-800-ITCHING