Perfect for campsites, hikes, and any outdoor enjoyment, the Thermacell Backpacker Mosquito Repeller creates a 15ft / 15ft protection zone so you can leave the messy lotions, sprays, and candles behind. Compact and lightweight, it fits in your backpack and provides up to 90 hours of powerful repellent in each 4 oz. gas canister. Silent and virtually odor-free, it won't disrupt your time in nature--you'll just come home without bites.