Wasn't sure a single ball would stay put, but the wearable shape sits comfortably and I forget it's there during my afternoon walk. Pumping it up to my own fit makes a bigger difference than I expected.
John★★★★★
The inflatable design is what sold me, and it actually delivers — you can adjust the fullness until the fit feels just right instead of guessing. Wore it around the house for an afternoon and forgot it was even in.
Daniel M.★★★★★
Wasn't sure a wearable one would stay put, but the shape holds comfortably through a whole afternoon of errands. The adjustable inflation really does let you dial in the fit instead of guessing.