The Essential Long String Tank The Essential Long String Tank 95% cotton 5% spandex. Made in Peru. Machine wash. Pull-on styling. Lightweight rib jersey fabric. RGBR-WS530. WCC24PT020CA20. rag & bone is rooted in a dedication to craftsmanship, innovation and timeless style. Each collection is designed in New York and developed through the time-honored techniques of some of the oldest and most supremely skilled manufacturers from around the world. Since the brand's origins in 2002 the focus has been, and always remains, on creating the highest quality goods.