We've received many requests to wash the "Neko Hanten"! So, we made this. (Neko Hanten doesn't directly touch the skin, so it's not washed very often) We've used quilted batting (polyester) for the filling. Features: ✔︎ Wide gussets for a warm waist. ✔︎ Great for when you get cold from the air conditioning in the summer. ✔︎ Doesn't bulk up when layered in the winter. ✔︎ Thinly made so it can be worn between clothes.