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Normally the beads are just white. But when you expose them to the sunlight,they change colour.
The beads are very sensitive to UV light, and once they have changed colour, they take a while to go back to their white state.
2 PCS in one order, $1, Free Shipping Australia Wide.
Tie them on your mobile phone, bags, anywhere that could remind you to protect your skin in the sun.
So we're allowed to link to our own eBay items now, is that how it works?