【Please Read Before Ordering】This product is a "pillowcase." Please be sure to confirm before purchasing. 【Instant Cool Down】The extremely cool-feeling pillowcase instantly provides a cool and refreshing sleep experience simply by attaching it to your existing pillow. With an astonishing coolness that is more than 3.2 times that of general contact-cooling pillowcases, you can spend the hot summer nights comfortably. 【Usable Year-Round with One Piece】The surface that touches the skin is different on the front and back. Use the cool side when you feel hot or humid, and the soft waffle side in spring and autumn. You can use the front and back sides according to the climate and your mood, and stay comfortable with just one piece! 【Antibacterial and Odor-Resistant】Summer, when it's humid and sweaty, is a season when bacteria tend to breed. The filling uses Teijin's functional fiber "Mighty Top II ECO." It provides peace of mind with antibacterial, odor-resistant, and anti-mite effects. It is also low in formaldehyde, so it is safe for children. 【Material】Surface: 75% nylon, 25% polyester; Lining: 100% polyester; Filling: 100% polyester. 【Size】Approximately 43*63 【Note】The colors may appear different depending on the environment in which you are viewing them. Please note that there may be differences in color and brightness from the actual product. 【Convenient】With a rubber band to prevent slippage, it can be securely fixed and is easy to put on and take off. It can be washed in the washing machine even if it gets dirty, and it dries quickly, so you can always keep it clean. It is lightweight and can be compactly stored, making storage and care easy.