PRODUCT SUSTAINABILITY FEATURES:: Environmentally friendly Active ingredient: Metofluthrin Scent-free, no smoke and no mess Does not contain DEET More effective than candles or torches TECHNOLOGY & DETAILS: TURN IT ON... MOSQUITOES GONE: Create a 20' protection zone, our largest protection zone ever, using this advanced repellent formula. Provides 36 hours of ultimate mosquito protection when used in Thermacell rechargeable repellers PERFECT FOR BACKYARDS AND ADVENTURE: Thermacell repellers are ideal for the backyard, poolside, gardening, and outdoor adventure. 100% scent free. On demand repellent, start and stop as often as you need LONG-LASTING DEFENSE: Each refill provides up to 36 hours of continuous mosquito protection. Compatible with Thermacell Rechargeable repellers - Radius and E55 (does not work with fuel and mat powered repellers) REPEL WITHOUT SPRAY OR SCENT: Repel mosquitoes without chemicals or sprays on your skin. No lotions or DEET to apply. No smoke, flames, or citronella. Not a messy trap or gimmicky sonic. Independently tested. EPA reviewed for safety & effectiveness THERMACELL GUARANTEE: All Thermacell Mosquito Repellent products come with a 100% satisfaction guarantee. Developed and Tested at our New England based R&D center. We stand by our products