More than 2,900 large-scale, multi-center and randomized clinical experiments jointly participated by seven university medical schools and two independent sleep clinics have confirmed that pyramids can achieve efficient sleep. At Johns Hopkins University, the sleep research project team led by Nancy Conlow, MD, conducted a five-month randomized self-control trial on 320 participants. "87% of users spend less time sleeping 1 ~ 2 hours, and S 1 sleep accounts for.