Raf Simons and The xx are launching their fashion capsule collection this month

Fashion designer Raf Simons and musical group The xx have lifted the lid on their recent collaboration.

The Belgian creative has been working with the British band (whose members are Romy Madley Croft, Oliver Sim and Jamie Smith) on a special capsule collection designed to mark the 10th anniversary of the group's debut album, "xx."

The collection, which is set to launch on December 12, spans t-shirts, patches, a cap and a set of pins, it has been revealed.

"When they reached out to do something together to celebrate the 10th anniversary of 'xx,' I didn't have to think twice," Simons told issue number 14 of System Magazine, where the collection has been unveiled and photographed by Willy Vanderperre. "I have been a fan of theirs since the very beginning, and I'm so happy and grateful for the fact we became friends and got to collaborate in so many ways."

Simons and the band have enjoyed a close working relationship over the years -- The xx performed at New York's Guggenheim Museum in 2014 at Simons' invitation, and the designer worked with the photographer Alasdair McLellan to create the video for the band's video "I Dare You" in 2017.

The collection will go on sale via The xx's webstore, as well as at select retailers including Galeries Lafayette in Paris, Galleria in Seoul and DSMG in Tokyo, among others.