Catering to travelers' sleeping habits.

According to Science News, hotels placing four pillows on a bed is not just for decoration, but also to cater to the diverse sleeping habits of guests. The pillows typically have different heights and softness levels, allowing guests to easily choose the one that best suits them, ensuring a comfortable sleep.

Everyone has different postures and needs – some only need one pillow, while others may want extra pillows for their back or legs. Therefore, having four pillows readily available allows guests to adjust them to their liking without needing to ask housekeeping staff.

Helps relieve neck, shoulder, and back pain.

Besides being used while sleeping, the pillow is also used by customers to lean against the headboard while reading, using their phones, or working on laptops. The soft pillow helps customers relieve back, neck, and shoulder pain, providing comfort.

When sleeping, having multiple pillows also contributes to better support for the neck, shoulders, and back of travelers, helping to reduce aches and pains. This is especially important for those who have just experienced a long and tiring journey.

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Placing four pillows on a hotel bed is a calculated move to optimize the resting experience and enhance aesthetics. (Illustration: Freepik)

Providing the perfect night's sleep.

"Sleep takes up one-third of our lives, so sleeping posture shouldn't be taken lightly. A suitable pillow can be the key to perfect sleep," Science News writes.

Medical research shows that pillows that are too high or too low are both harmful to the spine. High pillows can easily lead to pain and cervical spondylosis; pillows that are too low cause the head to tilt backward, increasing the risk of spinal curvature and acid reflux.

Scientists recommend that pillows should support both the head and neck to maintain the natural curve of the spine; an additional pillow can be placed under the legs to relax muscles and support blood circulation.

In addition, providing four pillows on each bed is a mandatory standard for some major hotel brands and chains, aiming to create a consistent and professional image. These pillows make the bed look luxurious yet also soft and cozy.