UV Detection Stickers for Sunscreen with SPF Sensing Technology, Know When to Reapply Sunscreen to Help Prevent Sunburn, 12 PCS 144 Patterns

Seem you are right, the seem to be UV detection stickers. amazon.com/FeidyLong-Detection-Stickers-Sunscreen-Technology/dp/B0H3643QM5/ref=sr_1_3?dib=eyJ2IjoiMSJ9.RcWBPNDezOinBWhUv4CUsa4_W5C4AAUqIidPuWaOg7wfkKwQIB6_EW08h-BZIHaOug8VAb2Y02D-yh63SZT5qZVUdUBTOH6SmGG4LzHD-TTY_LDnnD1WKjY5YZcXfB3lJ7iFe_ezZJf5yggREZARoilqpPG6O2PZgY0wuyUDMsbgLxVrfHhGyZcLVqfV9xMn1tC9w-AmjDZxDJyKIqI6NMJ7-tAYiaLEtZTKJfGUCr4.7Wd5LlHY-tgGqWBnWfylhoBHrMb-f4ZDGmK6mtkRolw&dib_tag=se&m=A1FZKOW4L5HZZ9&marketplaceID=ATVPDKIKX0DER&nsdOptOutParam=true&qid=1781814000&s=merchant-items&sr=1-3