Featuring a practical adhesive backing, these UV sensing patches are portable and versatile. They are for use during outdoor adventures, such as hiking, beach trips, or sports. The color-changing function alerts users to high UV levels, promoting timely action to apply sunscreen or seek shade for better sun protection. Features -Color:Transparent -Material:Self-adhesive sticker -Size:10.00X5.20X0.10cm/3.93X2.04X0.04in -Note:8pcs/sheet - uv detection: instantly detects uv intensity, helping you manage your sun exposure effectively -Immediate color change: the sticker changes color upon uv exposure, making it easy to see if your sunscreen is working -Skinfriendly: designed to be thin and comfortable, it suits all skin types and blends seamlessly with makeup and sunscreen -Outdoor essential: for various outdoor scenarios like beaches, mountains, and cycling, offering reliable sun protection guidance -Practical: promoting timely action to apply sunscreen or seek shade for better sun protection Package list: 20 x Sheets of Uv Sensing Stickers