About the product Our UV detection patch contains fluorescent powder and water transfer paper. It is breathable non-woven fabric, safe to use, high adhesion, comfortable fit, and not easy to fall off. Its usage is very simple: 1. Apply the UV detection patch to the surface of the skin or clothing. 2. This product will darken to purple due to ultraviolet rays. If the color becomes darker, you need to reapply sunscreen. And there is no residue after removal. It will not harm the skin and surrounding tissues, very suitable for children and adults. Product name: UV detection patch Product ingredients: fluorescent powder, water transfer paper Keywords: UV detection Weight: 8g Product specifications: 24pieces Product size: 7.8*11.4cm Note: Light reflection and different monitors may cause the color of the product in the picture to be slightly different from the actual product. Slight errors are allowed in measurement.