Send your question to Umbra! Q. Dear Umbra, I want to buy a stability ball and some purport to be PVC-free and made of non-toxic vinyl. Is there such a thing? RoseNew York City If that ball is vinyl, this scene isn't as healthy as it looks.Photo: Adria RichardsA. Dearest Rose, I give you snaps for seeking a more stable, balanced life. Stability balls promise all sorts of fun, from improving your posture to accidental masturbation (shh). Only problem is, many stability balls (also called exercise balls or Swiss balls) look like rubber but are, in fact, vinyl. Hardly a …
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