Most helpful critical review
4 of 4 people found the following review helpful
could be thicker
on 23 January 2014
not as thick as i was expecting this item to be, its comfortable and does its job though, what more can you say about a gym ball, oh the valve (CORCK) Is just a bit of plastic shaped right and rammed in the hole where you blow it up from. this is perfectly ok and does the trick at stopping the air getting out.