I still remember the day we decided to open up the most expensive mattress I had ever seen, the Tempur-Pedic GrandBed. At first, I felt a bit uneasy because it looked so clean, soft, and perfectly finished. But our curiosity took over, and we wanted to see what was inside and understand why it cost so much. From the outside, it seemed very plain. The surface was smooth and simple, giving no clue about what was hidden within. When we carefully opened it, we found that it was