Pet Calm Collar naturally reduces anxiety with appeasing pheromones that are activated by you pets body heat. 1.Adjustable size: The length is 38cm and 62cm, suitable for most dogs and cats. You can adjust the length according to your pet s neck to ensure comfort and it will not fall off. 2.Low sensitivity: Healthy materials and addition of non-allergic ingredients do not worry about animal allergies. 3.Continuous protection: Usually, the product can last up to eight months. 4.Waterproof: Even in the water, the collar can work, and the protection time will not be reduced. 5.Adjustability: Relieving pet anxiety, maintaining good mood and promoting healthy growth. Specifications: Material: plastics Product Category: pet collar Weight: 33.5g/60g Size: 62cm/38cm Applicable object: cat dog general purpose Package Included: Pet Calm Collar*1