The ’2026 Jungkook for Calvin Klein (CKJK)’ collection, a collaboration between BTS Jungkook and Calvin Klein, sold out in multiple countries worldwide.

Calvin Klein introduced ’CKJK,’ the first collaboration collection in its 58-year history to involve an idol directly in the design process. Jungkook participated in the entire creative process, from initial concept discussions to final design details. He personally selected the denim washing and customized the fit of some items, such as the brand’s trucker jacket, together with the Calvin Klein team. This collection was inspired by Jungkook’s passion for motorcycles.

On May 20th (Korean time), the sale of 36 items from the ’2026 CKJK’ collection began on the official Calvin Klein websites worldwide. On the U.S. website, all 36 products sold out in less than 30 minutes, and all items were sold out on the Japanese, Polish, Australian, and Italian websites as well. On the Korean website, all products except for some in the morning sold out on the same day, and sold out again after the second restock in the afternoon. On the Chinese website, the leather jacket worn by Jungkook in the photoshoot sold out in all sizes within one minute.

According to Pop Core, the Calvin Klein website crashed globally due to the influx of fans after the collection’s release. Calvin Klein announced on its official social media, ″A bold expression capturing the true style of a global icon. An unprecedented collaboration. This is Jung Kook for Calvin Klein.″