?Easy to Carry?UV Patches For Sunscreen is small in size and easy to carry. You can put it in your backpack when you go out. It will not take up your space and can be used at any time. ?Widely Used?These UV patches are ideal for any outdoor activity, such as hiking, beach, picnic, or garden.They monitor your sun exposure and alert you when you need to apply sunscreen. ?Waterproof & Sweat proof? Crafted with a water and sweat-resistant formula, our UV Detection Stickers are designed to withstand outdoor activities, UV detection stickers are ideal for both kids and adults, providing a fun and educational way to raise awareness about sun protection. ?How to Use? Apply the UV detection sticker to your skin and then apply sunscreen as usual. When the UV sticker turns purple, it indicates that the sunscreen has lost its effectiveness and needs to be reapplied. ?96PCS Color Changing Sunscreen Reminder?The UV stickers offer precise UV monitoring, with colours that change with different UV intensity levels.You can easily test the UV intensity based on the color depth.