Waterproof collars can be fitted for any size dog. If collar gets wet it will not impair effectiveness or the pet's protection. It is not necessary to remove the collar when raining or if pet goes swimming kills and repels fleas, ticks, flea eggs, and flea larvae for up to 7 months.
Active Ingredients:
Tetrachlorvinphos 14.55%
(S)-Methroprene 1.02%.