Features 1、150PCS STICKERS: Each pack contains 150 round shape UV stickers that change color and remind you to apply extra sun screen. They are perfect for outdoor activities. 2、COLOR CHANGING: Watch as the stickers change from transparent to purple/yellow when exposed to UV radiation. The depth of the sticker color varies with the strength of the UV. When the sticker color deepens, it is time to reapply your sun screen. 3、REUSABLE DESIGN: These stickers are reusable and the color changes will persist all day every time you reapply sunscreen, keeping you protected the entire time you are outdoors. 4、LOW ALLERGY AND SAFE: Provided with a low allergy rating and latex free adhesive, these stickers aid in keeping your children kids ages 3 above safe under the sun, assisting in preventing sunburns. 5、UV PROTECTION: Say goodbye to sunburns with this UV Stickers. They guide you on when to reapply your sun screen by displaying whether you have applied enough and when to redo it. Specification Item Type: UV Sun Stickers Material: PVC, Color Changing Paper Size: Sticker Diameter: Approx. 1.5cm / 0.6in Color Changing Area Diameter: Approx. 1cm / 0.4in Quantity:150pcs Characteristic: Non disposable, can be used repeatedly Color Display After UV Irradiation: Purple/Yellow Package List 150 x UV Sun Stickers