How to use: First, use the 360° size adjustment system to make sure the helmet fits you well. Adjust the peak according to the weather and your needs, for example, lower it to block the sun on a sunny day. When riding, always wear it properly on your head. Attention: Don't use the helmet if it has been damaged in a crash. Check it regularly for any signs of wear and tear. Maintenance: Clean the helmet with mild soap and water. Let it dry naturally in a cool place. Don't expose it to direct sunlight or high - temperature environments for a long time.