Each refill fits safe and snug in the mesh pocket on the outside of the PARA'KITO accessories (Wristbands, Kids Wristbands, Sport Bands & Clips). As the natural oils’ active ingredients are released into the air, they help to mask the human scents that would otherwise attract loitering mosquitoes. Works in all climate zones - temperate & tropical. It's even waterproof! Contains 2 replacement Pellets = 1 month of mosquito repellency. Each Pellet protects you for up to 15 consecutive days. Natural Essential Oils - DEET-Free. Innovative Diffusion Technology. Refills made in France.