Our medium-thickness mattress series (6-10 inches thick) is our most popular and best-selling style among Hong Kong families, considered the "golden ratio" choice. This thickness is perfectly compatible with common Hong Kong bed frames such as slatted beds and corrugated frames, ensuring hassle-free installation. Whether sleeping on your side or back, it maintains the natural level of the spine, providing all-day support for your lower back. If you are looking for a versatile and risk-free upgrade, the medium-thickness series will surely meet your expectations for quality sleep.