I’ve bought mine I was wondering the same.
@Natalie I use mine to just sit on to watch tv/ eat dinner haha as soon as I have a round back like on the sofa I need a crane to get me off it. So useful for more than just exercise! (Sorry I sound like I’m sponsored by big ball lol just really like it)
Haha! Don’t be silly it’s good to know. Feel like I need it in work for when I’m on a till
Any time you want! Have had mine for weeks cause it’s the only thing that relieves my back.