STEM For Your Skin Mosquito + Tick Repellent provides fragrance-free and non-greasy protection from mosquitoes for up to 8 hours. Its picaridin formula won't damage plastics or fabrics, including activewear and is non-irritating and breathable for your skin. Whether you're planning a day at the park, a backyard BBQ, or walking your dog, you can trust STEM to protect your family from mosquitoes and ticks so you can enjoy uninterrupted time outdoors. Fragrance Free. Non Greasy. Repels Mosquitoes up to 8 hours. Repels ticks that may cause Lyme Disease. Protection for your Family from Mosquitoes & Ticks.