When you put a Seresto flea collar on your dog the flea collar will remain fully effective for up to 8 months.
I use a Seresto flea collar on my dog and it does really stay effective for up to 8 months like the manufacture says.
Seresto flea collars work much better than those cheaper flea collars and they're well worth the money I spend on them.
The ingredients in the Seresto Flea collar transfers to the dogs skin body and hair.
The Seresto flea collar will begin killing fleas on your dog in just 2 hours after putting the flea collar on the dog.