Each refil lasts for 4 hours, so an entire pack will give you 48 hours of protection using the Thermacell Backpacker Mosquito Repeller.Synthetic insect repellent - uses Allethrin to mimic natural chrysanthemum repellentMat-only refill - to use in Thermacell Backpacker Mosquito Repeller12 x repellent matsEach mat lasts 4 hoursScent and DEET free
Best Price: £14.00 from Go Outdoors