Helps prevent harm and damage if knocked into anything Allows for free movement of the head and neck so that they can walk, eat, drink and sleep in comfort aiding a quick recovery Simple to fit and easily adjustable Available in 6 sizes, to fit most dogs plus one additional size for teacup breeds, cats & kittens A practical solution to avoid further self-trauma in cats & dogs of all breeds Made from a tough, lightweight and translucent plastic, which helps aid visibility. Padded on the inside and outside edge, for additional comfort and protection. Assortment Product-Colors May Vary. Easy to fit & adjust, there are 5 sizes for dogs available and one for cats. Material: Plastic Size Guide: Smart Collar Size 0 Extra Small (Neck 14-22cm) Smart Collar Size 1 Small (Neck 18-24cm) Smart Collar Size 2 Medium (Neck 23-30cm) Smart Collar Size 3 Large (Neck 29-38cm) Smart Collar Size 4 Extra Large (Neck 35-52cm) Smart Collar Size 5 Extra Extra Large (Neck 45-64cm)