Take a look at one of the least visited countries in the world: The Marshall Islands
A 20% DEET Premium Controlled-Release Lotion will work well against mosquitoes, but Dr. Zimring says he prefers the 20% Picaridin lotion since it also protects against ticks, gnats, chiggers, and flies. (In both instances, he recommends Sawyer brand.)
Part of spending time outside means battling ticks, mosquitoes, and other biting insects. For this, Nelson swears by permethrin.
And out of the products we tested, Dr. Zeichner highly recommends Sawyer Products 20% Picaridin Insect Repellent.