Walmart has given its intimates and sleepwear brand a modern makeover. The collection will go by the name "Joyspun." Joyspun replaces Walmart's "Secret Treasures" line, which lasted two decades.

To reinvigorate its approach to the category, Walmart on Monday announced that it has launched a sleepwear and intimates brand, dubbed Joyspun. The line replaces Walmart’s billion-dollar private label ...