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The Sleep&Sleep 'IU Deep Sleep Pillow' is gaining significant popularity in Korea, having sold over 900,000 units as of August 2026. This pillow is particularly favored by individuals who experience neck and shoulder stiffness upon waking, often referred to as 'pillow nomads,' and is widely recognized as a functional pillow that promotes sound sleep.
The core feature of this pillow is its sophisticated 4-division three-dimensional structure, designed to support the head, neck, and shoulders individually. The filling, a combination of Australian wool and Dacron, provides firm support, ensuring that the filling does not shift even with tossing and turning throughout the night, maintaining a stable posture. It is available in two sizes, S (5cm) and M (7cm), allowing users to choose based on their body type and sleeping habits. Developed by Sleep&Sleep, a sleep specialty brand under Evezary, it is the result of 5,860 hours of research and over 30 sample tests.
Users report satisfaction with its clean and luxurious design, which creates a hotel-like bedroom ambiance, and its firm, non-collapsing support. Many reviews highlight a reduction in neck and shoulder stiffness that traditional pillows failed to alleviate. However, some suggest that if pain persists even after using the pillow, it may be necessary to examine underlying sleep posture issues such as text neck or straight neck.
