I purchased this new on Amazon. I washed it once before using it, but ended up using a different sleep sack, so I washed it again and stored it. (The detergent used was arau baby) Suitable for newborns to 8 months old. The retail price on Amazon was 4,180 yen. The following is a description of the product: This is a soft baby sleep sack made of 100% organic cotton. It's a 2-way design with a function to prevent the baby from getting cold. Brand: MOMSMENU Material: 100% organic cotton Type: 2-way Function: Prevents baby from getting cold Features: Soft to the touch