Mustang One-Piece Squareback Seat For Harley Fat Bob The Mustang Squareback Seat for Fat Bob delivers an updated style to a classic look. A low-cut 11.5 driver bucket rises to meet the squared-off passenger section, offering good back support. The generous 7.5 width of the passenger section gives great support for two-up riding while maintaining a sporty look. The hand-sewn cover features a Tuck and Roll pattern in front with carbon fiber accents in the driver area and the rear. Features: 11.5 wide bucketed rider area provides excellent support in a low-profile, sporty package. 7.5 wide passenger sections offer comfortable 2-up riding. Handsewn cover with Tuck and Roll pattern and carbon fiber accents made from marine-grade expanded vinyl Mustangs proprietary controlled-density foam formula requires no break-in and retains shape and support after years of use Marine-grade fiberglass baseplate for long-lasting support and durability, with polyurethane bumpers to absorb vibration