Thank you for viewing. This is a sideways knee pillow for use while sleeping. 【Size】Approx. 250x230x130mm 【Material】Spandex・PU 【Weight】Approx. 320g I bought two, but one is enough for now, so I'm selling one. After using it, I definitely feel better when I wake up, so it's been helpful. Also, it feels good to wear, so I've been able to fall asleep easier. I will send it in the vacuum-packed state as it was when I purchased it. Please rest assured that it will immediately return to its normal shape as shown in the photo when opened. Thank you very much!