目的：研究不同软硬度床褥对睡眠质量的影响。

Objective: To investigate the various effects of the mattresses with different firmness on sleep quality.

客房内超柔软的床褥和人体工学设计的床垫保证让客人在一天的奔波后能有一个完美的睡眠。

The hotel's extra-soft bedding items and ergonomical design mattress ensures guests a good night sleep after an exhausted day.