Before use, choose the correct size based on your dog's measurements. Put the jacket on your dog, carefully guiding their legs through the appropriate openings or fastening it according to the design of the model. Make sure the jacket does not put pressure on the chest, neck or abdomen, restrict movement or make it difficult for your dog to sit or lie down. Use during walks in cold, windy or damp weather. After each walk, remove any dirt if necessary and allow the jacket to air dry naturally.