NEW FORMULA---100% natural ingredients,Parenda Flea Collar only contains a proprietary blend of essential oils.hypoallergenic, no mess,odorless,non-greasy,safe and effective. 8 MONTHS PROTECTION---Parenda flea collar works around the clock to helps your beloved furry friend get rid of internal & external fleas,ticks ,flea larvae and lice.The protection can last for up to 8 months. FITS SMALL DOGS UNDER 18 LBS---Size:14.96in/38cm.Parenda flea collars suitable for all kinds of puppies under 18 pounds.The collar is fully adjustable and you can cut the collar to adjust it to the proper length for your dogs. UPGRADED DESIGN---The Parenda flea collar adds a waterproof design and an emergency breaking point that allows your small dog to walk and play in the rain or wet snow without worrying about their safety and the effectiveness of the collar. 100% SATISFACTION --- Our customer enjoy 45-day money back guarantee! Any questions, please feel free to contact us. We will provide you with timely, honest and efficient service.