Therefore, our safety helmets have been meticulously designed from the very beginning, fully considering the users' needs for portability and maintenance. The inner lining is fixed by a fastening device, which is convenient for disassembly, cleaning and regular replacement, thus solving the problem of difficult cleaning. Workers do not need professional tools; they can simply press the snap to remove the entire lining. After removal, the lining can be easily cleaned with water and mild detergent to remove sweat, dust and stains accumulated during long-term wearing, and it can also be quickly dried for reuse. This effectively solves the long-standing problems of cleaning difficulties and high replacement costs of traditional safety helmets. Moreover, our safety helmets have a scratch-resistant surface. We will provide a safety helmet maintenance guide.