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My neck has been so bad lately because of studying, so I used the Oa cervical pillow as a good opportunity! Since you can use it at different heights depending on the direction, it is very useful, and it definitely supports my neck, so I think my sleep quality has improved!! The cover is double-covered, so it is easy to wash and hygienic to use:) It is a product that has been certified as safe for harmful ingredients, so I trust it and recommend it as a housewarming gift or a gift for my parents🤍🖤 #Five senses review #제품협찬 #Pillow recommendation