Roadsofa™ Carbon Fiber SeatContrasting carbon fiber weave Tall lumbar support and wide driver saddle supports the back and legs for superior comfort, while the streamlined nose improves the rider's reach to the ground Refined split-cushion design separates the seating surface from the lumbar support, reducing tailbone and back pressure from maximum long-range comfort Can be purchased with or without Drivers Backrest which has independent adjustments for fore-aft position, height and angle, and folds forward SaddleGel™ in front and rear reduces tailbone pressure and increases circulation and comfort for both driver and passenger Designed and made in the USA 8-1/2" (21.59 cm) lumbar support.