Grey seat and kneeling pad, wooden frame, castors.
One of the rear castors falls off when the chair is lifted from the ground, which is annoying but it doesn't come off whilst the castors remain on the ground so doesn't really affect use.
It could probably be glued in place but never annoyed me enough for me to bother.
Ergonomic Kneeling Chair/Posture Stool (Athelney TA3)
This offer has been gifted to someone and is no longer available.