1UV Sun Detection: This patch is simple and effective UV detection method, reminding you to apply sunblock cream in a timely manner to ensure that your skin is not damaged by harmful UV and sun. 2Mild Adhesive: These UV detection stickers use mild and low allergic adhesive that is easy to remove, leave no marks, and can last for a whole day, making them suitable for sensitive skin. 3Convenient Use: Take out the sticker and apply it to the skin. Take an appropriate amount of cream and apply it to the sticker and skin. When the sticker turns purple, reapply the sunblock cream. 4Good Performance: These stickers have the advantages of high adhesion, comfortable fit, and no adhesive residue, which will not harm the skin and surrounding tissues, can be used with confidence. 5Specifications: This kit provides 3 packs of UV detection stickers, totaling 72 pieces, making it convenient to use and replace at any time, suitable for kids and adults to use.