Hitsuji no Iranai Makura Shigoku (Pillow That Doesn't Need Sheep - Supreme) Purchase Date: 2025/02/16 Usage Period: About 2 weeks Purchased From: Hitsuji no Iranai Makura Official Sleep Research Institute Online I gave this to my husband as a present, but he didn't use it at all. There is no sagging or deterioration. Also, I only removed the cover for the purpose of selling it, and I haven't removed it otherwise. Due to the nature of the material, dust will inevitably accumulate, so please understand this when you receive it. I will pack it carefully to prevent any scratches. Keywords: Pillow, stiff shoulders, snoring prevention, low resilience, high resilience, sleep pillow, shoulder, neck, straight neck, washable, comfortable sleep pillow, gel pillow