Paul McCartney is auctioning his custom shoes from the 2012 London Olympics for charity.

These shoes were made to be collected.

Paul McCartney is auctioning off the custom shoes he wore for his performance at the London Olympics opening ceremony in July 2012 to raise money for charity. stage shoes, which will be presented as part of a Sealed by Sotheby’s The sale, which runs from May 24 to 31, is expected to realize between about $12,500 and $18,800 (£10,000 and £15,000).

McCartney has been rocking shoes since the 1960s. The British musician and his fellow Beatles bandmates John Lennon, George Harrison, and Ringo Starr popularized what we now call the Beatle Boot in the 1960s. Originally made by Covent Garden footwear company Anello and Davide, the black leather boot, then known as the Baba, was a twist on the classic Chelsea with a high Cuban heel that featured four livery poodles and Liked people who knew other styles. The Beatles made some changes to Baba, creating a style of the name that became a highly sought-after fashion accessory.

The pair heading to auction this month is based on the iconic Battle Boots but features a new, more durable material. Shoemaker Steven Lowe of Eastbourne Shoe Shop has created the shoes with alternative suede instead of traditional leather. McCartney played Kicks on stage at the opening ceremony of the 2012 London Olympics and at the Queen’s Diamond Jubilee celebrations that same year. He also wore them for his “On the Run” tour in Europe, South America, the US, Canada and Mexico.

McCartney is selling shoes to raise money for Meat Free Monday. Burt founded the nonprofit with his daughters Mary and Stella McCartney to encourage people to eat a healthy diet and to go meat-free at least one day a week.

“Since it was time for me to get a new pair of shoes, I thought this might be a good way to help celebrate the 15th anniversary of our Meat Free Monday campaign,” McCartney said in a statement. “My shoes and I have great memories of that special evening at the Olympic opening ceremony in London. It was a high point to be involved in such a grand and wonderful event. Something I will always remember.”

If you happen to be in the British capital, the shoes will be on display at Sotheby’s New Bond Street Galleries in London ahead of the auction at the end of May.