Single-reverse cube: Individual sides sewn together, 3 bottom edges finished with hook-and-loop fastener to enclose foam cube
Single-reverse quarter-ring: Individual sides sewn together, one side finished with hook-and-loop fastener on 3 edges (sides and bottom) to enclose foam element
Single-reverse 3-seater: Individual sides sewn together, 3 bottom edges finished with hook-and-loop fastener to enclose foam cuboid
Single-reverse cylinder: Individual sides sewn together, side and bottom finished with one zipper each to enclose foam cylinder