1851, Miller and his wife began use cotton and wool to make their first bedding.  His grandfather change his name be caluful Miller, caluful means california luxury future living. His grandfather hope his family bring the luxury living style to America.

1865, the first spring-structured mattress was born in the United States. Miller was deeply aware of the importance of spring-structured mattresses for sleep comfort. After several twists and turns, he learned how to make spring-structured mattresses.

1876, France gave the Statue of Liberty to the United States to commemorate the 100th anniversary of American independence. In the same year, the “Hundred Years Expo” was held in Philadelphia. At that time, Miller took the first CALUFUL mattress he had created by hand to participate in the Centennial Expo. He was taken by the members of the European royal family who came to visit and brought back to Europe.

1929 The Stock Market Disaster of America caused The Great Depression, and Caluful Miller Family was compelled to stop mattress business temporarily.

In the 1980s, LEADER mattress was established in Los Angeles. By chance, they saw a very old mattress in a friend’s house. When they touched the mattress, they found the mattress very comfortable and lying on the cloud. So they tried every means to contact Miller’s descendants, and bought some mattress recipes and how to make them, and used them in their own mattresses.