Prayer mats, also known as prayer rugs, are used by Muslims during daily prayers. They typically feature a simple design, with a rectangular shape and a black border outlining the mat. This border serves to highlight the central prayer area, which may be adorned with additional decorative elements or symbols. Prayer mats are often made of materials such as wool, cotton, or silk, and may be embroidered with intricate patterns or calligraphy. The black border is a traditional feature of many prayer mats and serves as a reminder of the sacred nature of the space in which prayer is performed.