A waterproof feature is a characteristic or design that makes an electronic device, clothing item, or other product resistant to water or moisture. This means that the device can be used in wet conditions without being damaged or malfunctioning. Waterproof features are often indicated by an "IP" rating, which stands for Ingress Protection. The first number in the IP rating indicates the level of protection against solid objects (such as dust), while the second number indicates the level of protection against water. A higher second-number rating means greater resistance to water intrusion.