Adams Plus Flea and Tick Collar for Large Dogs, Up to 25 inch Neck (1016495)
Adams Plus Flea and Tick Collar for Large Dogs, Up to 25 inch Neck will keep your pet protected from fleas, flea eggs and larvae, and ticks for up to 5 months, even if your dog gets wet. Because this Adams Plus Flea Collar has Precor insect growth regulator (IGR), it breaks the flea life cycle to stop reinfestations.
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Keeps fleas away
These collars work really well, but I noticed a problem sometimes. Sometimes, after a few months, they start to crack. I even had one break completely. So, I'm not sure if it is totally accurate to say they last 5 months, but maybe I'm doing something wrong. Even so, they certainly get rid of fleas and keep them away.