90s-inspired waffle knit sweater tank featuring a dramatic open back. Waffle Knit Mock Neck Open Back Fabric + Care A medium weight knit with a slightly fuzzy waffle handfeel. Self: 49% Acrylic 31% Recycled Polyester 17% Nylon 3% Spandex Made from recycled PET (plastic) bottles, these recycled PET fibers reduce environmental burden by emitting 20% less carbon dioxide, GRS certification by Control Union Dry Clean Only