The Duke of Cambridge sported a bracelet made from the brightly coloured bands during a visit to Coventry's War Memorial Park today (July 16).
It's not known who made the bracelet for him, but it's thought to be a gift from a wellwisher at the event.
We're enjoying the thought of William's wife the Duchess of Cambridge whiling away dull evenings in Kensington Palacr making loom band bracelets. Kate was spotted wearing a loom band bracelet during the Royal Tour of Australia and New Zealand in April.
Kate's parents, Carole and Michael Middleton sell a product similar to Rainbow bands through their mail order company Party Pieces. So perhaps Kate has been making the bracelets to support her family's business.
There's certainly money to be made - a dress made out of loom bands recently sparked a bidding war on eBay and received a winning bid of £170,000.
Prince William was spotted sporting the band during a visit to Coventry's War Memorial Park, where he attended a reception and gave a short speech.
As well as the loom band bracelets, William also received a birthday present for his son, Prince George, whose first birthday is on July 22.
He was given a brown paper bag with a gift tag that read: "Happy Birthday Prince George. With lots of love from all at Earlsdon Primary School, Coventry." Intriguing!