[DETAIL] Suitable for most dogs and cats. You can adjust the length according to your pet s neck. Healthy materials and addition of non-allergic ingredients do not worry about animal allergies. The calming cat collars start working within 1 hour of wearing, will releases pheromones for lasting up to 30 days. Even in the water, the collar can work, and the protection time will not be reduced. Relieving pet anxiety, maintaining good mood and promoting healthy growth. Specifications: Material:Silicone Size: 38cm(14.96in)/63.5cm(25.00in) Package Included: 1xPet Calm Collars [ATTRIBUTES] - Lifestage: Adult - Hign-concerned Chemical: None - Is Smart Device: No - Lifestage: Adult - Hign-concerned Chemical: None - Is Smart Device: No - is_customized: No - Material: Plastic - Type: Collars - Origin: Mainland China - CN: Zhejiang - Type: Dogs - Material:: Silicone - Size:: 38cm(14.96in)/63.5cm(25.00in) - Package Included:: 1xPet Calm Collars - Feature 1: Pet Supplies