Natrapel 8 Hour Insect Repellent Spray 6 oz (Pack of 4) Provides 8 hours of DEET-Free protection from mosquitoes, black flies, ticks and more. Specially formulated with 20% picaridin, the only formula that consistently shows equal or better performance than DEET in independent, clinical tests. Completely safe on gear and will not melt jackets, fishing line, and other synthetic materials. Use when hiking, backpacking, rock climbing, working outside, or more. 6 oz eco-spray can delivers even, continuous coverage without releasing harmful aerosols.