The open-cell structure of AirCell™ Foam allows air to flow freely through every layer of the mattress, continuously releasing body heat instead of trapping it beneath your back. The mattress breathes with you all night—so you don't have to lower the air conditioner to 22°C or keep turning over searching for a cooler spot. Sleep soundly through the night and wake up without a sweat-soaked back.
AirCell™ Foam is engineered with three ergonomic support zones: a softer head and shoulder zone to relieve pressure, a firmer lumbar zone for spinal support, and a balanced hip and leg zone for proper alignment. You'll notice the difference from the very first night—especially if you often experience shoulder discomfort when sleeping on your side.
Whether it's a Japandi-inspired apartment, a low platform bed, or your next new home, the 18 cm Ru9 Air is designed to complement a minimalist lifestyle. It's 30–40% lighter than traditional thick mattresses, making it easy for one person to lift and move for cleaning or relocation. A premium mattress that moves with you—instead of tying you to one place.