I had one of these but a sized version, got it off used nappies brand new and sold it to a lady on here a month or 2 back.
THey are lovely, mine was cotton or bamboo velour outer, hemp fleece inner and a contoured soaker with bamboo velour on top. Poppered and serged. IT was fab but needed to fund my wool so it went
i have no idea where they are from though as i googled to try and find more to buy (it was a fitted)