ERGMY Dog Flea Collars - Durable Dog Flea Medicine - Allergy Free, Odorless and Waterproof Flea Collar LONG-LASTING FLEA PREVENTION: Ergmy flea medicine can eliminate and repel flea eggs, ticks, lice, larvae from dogs. It is most effectively used for continuous 8 months under normal condition. FLEXIBLE FOR ALL SIZES OF DOGS: Small, medium and large dogs all can possess this 25 inch flea collar. It can also be cut off to fit your dog's neck if too long. NO ALLERGY, NO ODOR: Our tick repellent collar contains no toxic components, so it does not cause irritation or allergies in dogs. Besides, its natural composition releases no disgusting odor, only light pleasant smell otherwise. WATER RESISTANT: Don't worry if your furry dog loves to play with water. Our dog collars are water resistant and functions well even in the rain. 100% SATISFACTION GUARANTEE: we offer a money back lifetime guarantee with every purchase. If our dog flea and tick prevention collar does not meet your expectation, feel free to return it during first 60 days. Please contact us if any issues occur also.