TORRIX Dog Collar &ndash; 8-Month Flea Medicine &ndash; Adjustable, Safe and Water Resistant Flea Prevention Collar ADJUSTABLE: Our dog collar is designed 25 inches long, so it fits dogs of all sizes and ages. If the flea collar is too long, cut off the excessive length and keep it in the dogs house for extra protection. 8-MONTH TICK PREVENTION: Torrix collar is an effective medicine for tick repellent up to 8 months. The active ingredients will function best during this time. After that, it should be replaced for another maximum protection. SAFE, ECO-FRIENDLY: Thanks to natural composition such as Eucalyptus and Citronella oil, Torrix dog collars are absolutely harmless to your dogs health. It does not contain toxic chemicals that cause allergies to your pet. WATER PROOF: The water-resistant design makes it possible to function well even in the rain or when washing your pet. LIFETIME MANUFACTURERS GUARANTEE: we offer a money back lifetime guarantee with every purchase. If our flea and tick prevention for dogs does not meet your expectation, feel free to return it within the first 60 days. Please contact us if any issues occur also.