Is there latex in Apple Watch straps?

Hi,

I'm asking this question as I have been unable to find a definitive answer from my local Apple store. I am highly allergic to latex and want to know if Apple use latex in their watch straps. The staff at my local Apple store were uncertain, but 'thought it would be okay' (clearly don't know what a latex allergy is or how it works), so I need to know one way or the other. I am unable to afford either the metal or leather straps, so the sports bands are what I am looking at. Does anyone know?

Many thanks,

Ruth