Sibyl PopoverJOSEPHINE Sibyl Popover in Butter Check The Sibyl Popover returns this season in our custom designed Butter check, created exclusively for Josephine. Crafted from beautifully washed 100% cotton with the feel of lightweight denim the same fabric as previous seasons the Sibyl Popover features bold, exaggerated sleeves and considered detailing throughout. The soft Butter base is elevated by rich Port Wine woven through the check, adding warmth and depth