Plymouth-based Select Comfort, aka Sleep Number, topped the J.D. Power's second annual mattress satisfaction survey.
Sleep Number also topped J.D. Power's first mattress satisfaction survey last year.
"Our customers' satisfaction is the direct result of our team's dedication and passion to improving lives by delivering unparalleled sleep experiences," said Shelly Ibach, Select Comfort president and chief executive officer in a company statement.
J.D. Power, a consumer intelligence and data analytics company, surveyed 2,622 customers who purchased beds within the last 12 months and ranked mattress companies on a 1,000 point scale.
Greg Truex, senior director of the At-Home practice at J.D. Power, said that while Sleep Number remained at the top of the list there was a "little bit of jostling between the brands ranked two through six."
Sleep Number scored 887, one point higher than Simmons/Beautyrest and 32 points higher than the average score of 855.
J.D. Power measured seven factors to arrive at its overall mattress satisfaction score. In order of importance those factors were: comfort, price, support, durability, variety of features, warranty and contact with customer service.
According to J.D. Power Sleep Number scored particularly well on the warranty and features factors.