This is a sleep swaddle from WhiteLapin. Size S (Weight 3.5-6kg, Age 0-4 months) Beige Purchased for 5500 yen and used for about a month. It helps babies sleep incredibly well. The bottom can be opened with a zipper, making nighttime diaper changes very easy. Also, the detachable arms are great for use after the baby starts rolling over. I washed it frequently, so there may be some pilling or fuzzing. Please check the images.