It seems comfortable because the back becomes a C-curve, and the whole body is wrapped in a cushion. I was very grateful that the baby started sleeping for longer periods. Usable from newborns. If you are preparing before childbirth, or if your baby wakes up easily, please consider this. The laundry detergent used is additive-free and unscented, for babies. Since it was used by a child, please forgive any small stains that may have been overlooked. I will check it before shipping and pack it in a box. I used it a few times until the baby started sleeping on their side, but I had a towel underneath, so there are no noticeable stains. I'm giving it away to someone who can use it, as I can no longer use it since the baby started sleeping on their side. 【Size】W110cm x D70cm x H15cm 【Material】 Outer fabric: Stretch knit / 100% polyester Covering: Pile / 82% cotton, 18% polyester Filling: Crea beads (expanded polystyrene) ■ The cover can be washed. Put it in a laundry net and wash it on a delicate cycle, shape it, and dry it in a well-ventilated place in the shade. ■ You can adjust the beads to your preferred height by adding or removing them yourself. ■ When refilling, please be careful of accidental ingestion by your child. ■ The main body cannot be washed. If it gets dirty, wipe it with a cloth soaked in a mild detergent, and then wipe it thoroughly with a dry cloth. C-curve egg cushion breathable pad Back switch sleep egg nap sofa baby pile bead cushion cushion