ALZOO MOBILITY COLLAR FOR DOGS First collar that naturally helps to promote joint flexibility & a healthy response to inflammation while working to diffuse over the entire body, penetrates through the skin, & relieves joint discomfort. Effective blend of plant-based essential oils to help soothe any action on joint discomfort. Proven through Clinical Studies Dogs suffering from joint discomfort to reduce stiffness & improve mobility. First improvements visible within 3 days of usage No synthetic pheromones, PVC, or phthalates Slow-release technology Proven effective when used as directed. Long-lasting; up to 30 days efficacy Waterproof