FIT® Organic—Mosquito Repellent. Finally, there is a USDA organic mosquito repellent that pregnant women and children can use without worry. Not only is it safe, but it’s also effective! Using a combination of organic lemongrass, and organic oleic acid our mosquito repellent provides protection for up to three hours WITHOUT any harsh chemicals. And best of all it has a preferred scent profile. No more stinky sprays!