PRO 11 WELLBEINGWorx Series Orthotic Insoles for Plantar Fasciitis and Flat feet

What are they made of as I am allergic to latex

Does the packaging fit through letterbox?

This was delivered a few weeks ago but is completely the wrong size (3/4 uk instead of 6.5/8). i am being told i can't return it without reason. why?

What does it mean by ‘2 Pack’? Is that 2 pairs of insoles?