[ Natural Citronella Oil]The mosquito repellent bracelet works from plant scents. Natural Plant Extracts,Natural oils including Citronella,Geranium,Geraniol .Health for adults,children and family. [Good Effect of Anti-Mosquito]The Mosquito repellent bracelet combine geranium plants and aromas containing citronellal plants. A geranium plant is a plant with a volatile nature. Under normal conditions, the plant volatilizes its own odor molecules through photosynthesis. Citronellal itself is a prominent effect of mosquito repellent. [Fits Children and Adults]Mosquito repellent bracelet is adjustable-length design provides a comfortable fit for everyone, including children and adults. [300 Hours of Protection] The effective time of per bracelet last 250-300 hours.When not in use, please wrap the straps in the sealed bag so that the time of use is not shortened.