The regular price was 6,930 yen each. I bought two new ones this fall, and they were used for about a month and a half. Having two for washing and changing was a great help, both for everyday laundry and when they got dirty at night. I didn't have to worry about my child not sleeping because the sleep sack was dirty during this difficult time. Although the size is still within the age range, I am selling them because my child has outgrown them. The sleeves can be opened one at a time, so when my child started to roll over, I sometimes let them put their arms out one at a time from when they were feeling well to practice sleeping with their arms out. I was grateful that they were able to practice sleeping with their arms out properly during the time they wore this sleep sack. The sunlight was too strong, and the wrinkles are quite noticeable in the photos, but they are not this pronounced in reality. The following is from the website: <Features> Breathable natural fibers Moderate fit & elasticity Bell-shaped bottom that is gentle on the hips Arms can be put out to sleep TOG-rated warmth 2-way zip sleep sack Non-toxic and skin-friendly material No need for a comforter Machine washable <Material> 55% organic cotton / 40% bamboo rayon / 5% polyurethane