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The easiest way

to fall asleep

COZA partners with trusted companies to ensure

a restful night for all.

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Looking to buy COZA in-store?
Find it at Onnuri Pharmacies nationwide.

A sleep beverage you can enjoy naturally—free from sleeping pill ingredients.

COZA is a sugar-free, alcohol-free, and cholesterol-free product, making it a worry-free choice for students and adults alike, without concerns about side effects or addiction.

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Preclinical & clinical research completed in partnership with Bundang Seoul National University Hospital.

COZA is 2.6 times more effective than 3mg of melatonin and does not cause tolerance even with long-term use.

The morning after drinking COZA, waking up just feels different. When my alarm goes off, I just open my eyes effortlessly.

Real review from a COZA VVIP customer

Sleep should be a happy moment that everyone can enjoy.

​COZA goes beyond the idea that ‘sleep = a problem’—we support your choice to embrace moments of rest on your own terms.

Trending news

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​Partnership & Collaboration Inquiries

Join Romansive in shaping a healthier sleep culture. Our team will review your proposal and reach out to you soon.

Instagram

Follow COZA’s official accounts for the latest updates and useful insights.
@cozasleep.kr

Romansive Co., Ltd.
​​Business registration number: 126-88-02410
Contact: 070-8018-3908 / romansive@romansive.com
Address: Romansive | Room 301, Sillim Venture Startup Center 3, 46 Hoam-ro 26ga-gil, Gwanak-gu, Seoul, South Korea
CEO: Lee Soo-hyun
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