Ships within 24 hours. "Oshojo pants" are pants designed to prevent bedsheets and pajamas from getting soiled when a child wets the bed during the night. They use waterproof material on the inside to absorb bedwetting and prevent it from soaking through to the bedding. They are useful in various situations, such as during toilet training or overnight events. The size is approximately 90-100. The elastic in the waist can be replaced, so the size can be adjusted. I always had my child wear these at night during toilet training. I wore them just in case, so there were no leaks. As shown in the photos, there is a feeling of wear, so I would appreciate it if you could understand the pilling, etc.