The Company Of Animals - Collar Elizabethan Rigid Size 5. The SMART COLLAR is a humane method of preventing animals from aggravating a wound or injury. These rigid cone-shaped collars are made from a tough,lightweight and translucent material, which helps aid visibility. The patented silicon padding along both inner and outer edges creates a product that is much more comfortable for the animal to wear which is extremely important for the healing process, particularly during a time when he is stressed. The pet will not bruise or damage itself or its surroundings if it crashes into humans or furniture. Simple to fit and easily adjustable, the Smart Collar is available in five sizes to fit most dogs plus one additional size for teacup breeds and cats and kittens.