The hairstyle preserving liner is a hairstyle preserving liner that is attached to the inside of a head covering and fitted to the head of a human body, and includes: a liner main body; and multiple protruding members formed on the surface of the liner main body facing to the head. In addition, in the hairstyle preserving liner, the heights of the multiple protruding members are set such that the radially innermost protruding members around the central part of the liner main body are highest, and the radially outermost protruding members are lowest, and the liner main body is formed of a flexible material and has multiple tongue-shaped parts that in an expanded state, extend circumferentially at regular intervals and radially outward around the central part facing to the top area of the head of the human body.
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