PetArmor® Extend™ Flea & Tick Collar for DogsThe PetArmor Extend Collar for dogs delivers up to eight months of continuous protection by killing and repelling fleas, ticks, and lice, no prescription needed. Also targets flea larvae, effectively breaking the flea life cycle and preventing the pests from coming back. Completely odorless and non greasy, leaving no chemical smell or residue behind. With water resistant protection that lasts through every season, you can have peace of mind knowing