Attaches securely in seconds using two encased metal strips that are inserted between the window and door frame. Using metal rather then plastic prevents the protector from sliding out when your dog jumps up on the side panel. Constructed of durable waterproof non-corrosive 600 denier polyester fabric. Protects your door from scratches and limits hair, dust, and debris from getting into door handles, power window buttons, etc. Designed to allow the rolling up and down of windows without removal of protector. Dimensions: 24" x 17" Measure the width of your door to best determine the size that fits. Too Small? Consider the 27 inch model.