Burlington’s No Fly Zone® Insect Repellent Technology continues to lead in the fight against biting insects like mosquitoes and ticks. No Fly Zone is a permethrin-based technology that may help prevent the spread of insect borne diseases by repelling insects through apparel, uniforms or gear. This technology is similar to the natural insect repellent found in certain chrysanthemum plants and works as a contact repellent affecting the insect's nervous system causing it to fly away before a bite can occur.