The phrase denotes a protective accessory specifically designed for a particular smartphone model. Functionally, it serves as an enclosure to shield the device from physical damage. For instance, a user might seek such an item following the purchase of a new Apple iPhone 7 to prevent scratches or breakage from accidental drops.
This class of product provides multiple advantages. It offers a degree of impact resistance, potentially extending the lifespan of the mobile device. Furthermore, selection provides an opportunity for personalization, allowing users to express individual style through various designs, materials, and colors. Initially conceived as primarily utilitarian, these items have evolved to incorporate aesthetic considerations and enhanced features such as wallet compartments or integrated stands.