Large Hot Tubs – the J-470 may be the right large hot tub for you! Jacuzzi J-400™ spas provide padded headrests that move up and down to accommodate different body heights. Another one of the many ways Jacuzzi helps you relax, the J-400 Hot Tub Collection’s adjustable pillows are unlike those in other large hot tubs. At night, colored lights glowing from the waterfalls and from new underwater lights add to the peaceful feeling. Something you won’t find in other large hot tubs.