Purchase date: 2025/06/16. I realized I bought the wrong product from the series I wanted, so I'm putting it up for sale. I opened the package, but I haven't used it even once. When shipping, I will wrap the black outer box with cushioning material. The "Hitsuji no Iranai Makura -Fit-" series, where you fall asleep before you can count sheep. ■ Features of the Hitsuji 01 4-level height adjustment function Height can be adjusted by combining TPE core and crystal fiber. You can adjust your sleeping environment to suit your sleeping position, physique, and condition of the day, such as sleeping on your back, side, or stomach. ■ Features of the Hitsuji 02 Deep sleep with smooth tossing and turning Tossing and turning is important for high-quality sleep. For those who have stiff shoulders and neck, wake up at night, or wake up every time they toss and turn, increasing the number of grid points disperses pressure, creating a feeling of being enveloped and enabling smooth tossing and turning. It instantly fits the shape of the head and the position of the shoulders, making it easier to toss and turn. ■ Features of the Hitsuji 03 The secret to being incredibly comfortable The soft TPE material and the distinctive triangular grid structure support the neck and shoulders simultaneously, creating an unprecedented feeling of floating in water and enveloping the head, providing an outstanding sleeping experience. The black pillow body, which combines "activated carbon" and "TPE material," has a 3D wave shape with a depression in the center, whether viewed from the front or the side. When you toss and turn, the height is created, allowing for comfortable side sleeping. ■ Features of the Hitsuji 04 Clean all the time because it's difficult for dust mites to breed The TPE core and crystal fiber can be washed as is, freeing you from the worry of not being able to wash your pillow when it gets dirty. TPE is a material that maintains revolutionary cleanliness and is resistant to dust mites, odors, and mold, making it ideal for those who suffer from allergies, scalp problems, and oil stains. ■ Features of the Hitsuji 05 Sleep comfort is the same as new even after 10 years of use Approximately 10 times the amazing durability of a typical down pillow. ■ Pillowcase with Tencel included The pillowcase, which contains Tencel with a silky luster, has a very soft fabric and high moisturizing properties, which enhances the pillow's squishy feel and is characterized by a pleasant touch. 5 Recommended Points 1. Comfortable fit: Feels like you're floating in water 2. 4-level height adjustment 3. Excellent breathability: Doesn't get stuffy, comfortable even in summer 4. Sleep comfort is the same as new even after 10 years of use 5. Washable!