Keep your dog happy and healthy with the Alzoo Plant-Based Flea and Tick Collar for Dogs. The plant-based ingredients repel fleas, ticks and mosquitoes for a comfortable and itch-free feel, and it lasts up to 4 months for effective protection day after day. The waterproof design allows you to bathe or walk your dog in the rain without worry, and the dog collar is cruelty-free ensuring you feel good about your pet-friendly purchase.