Two-piece slings ship as two complete pieces in one order — a seat sling with top and bottom rail pockets, and a back sling with its own pair of pockets. Both pieces are cut from the same fabric so the color and pattern match exactly.
Common chair brands that use two-piece slings: Brown Jordan Pasadena, Tropitone Sorrento, Woodard Wrought Iron, and most aluminum-frame patio dining chairs from the 1990s onward. If you are unsure whether your chair is one-piece or two-piece, look for a horizontal gap between the seat fabric and the back fabric.
Casual Slings cuts both pieces with the same orientation so striped or multicolor fabrics line up across the seat-to-back transition. Triple-notch and single-notch markings on the cutting bed identify top vs. bottom for the cutter operator.