CASELAST Mosquito Repellent Bracelets are made of all natural ingredients and is DEET free. My husband loves to wear these bracelets when he's outside doing yard work and especially when he goes fishing. This bracelet does a really good job at repelling insects-especially mosquitoes. I like that this band is adjustable so my kids can wear it when they play outside. My 9 year old has very sensitive skin and bites are the worse for him. Of course, he loves to play outside the most and so I have to keep repellant on hand for him. He loves these bracelets. He thinks they are stylish and really prefers to wear these rather than getting sprayed down. These bracelets are also waterproof which is great for summer and swimming. They come with two refills. Each refill lasts for 15 days. Overall, this is a nice set of mosquito repellent bracelets. I received this set of bracelets in return for my unbiased review. You can find out more about CASELAST Premium Mosquito Repellent Bracelets @ http://www.amazon.com/CASELAST-Mosquito-Insect-Repellent-Bracelet/dp/B00Y1S6QIC/ie=UTF8?m=A2OO1SA58YKWWH&keywords=mosquito+repellent+bracelet.