Although unused, there are sunspots on the front and back. Please refer to the photos. Includes instruction manual. Please see below for functionality. 【Functionality】 This back support belt uses stretch material, providing a comfortable fit. The double structure firmly supports the lower back, contributing to pain reduction. 【Size Adjustment】 The hook-and-loop design allows for easy size adjustment. By achieving a fit that suits you, more effective support can be expected. This item is available for immediate purchase. Please feel free to ask if you have any other questions.