I think you are all going to tell me that IABU and I am a snob too, but what the hell....
My MIL hasn't been back to work since she had my DH (33 years ago!), and frankly never seems to me to have enough to do! Since I have been pregnant she has been knitting tons, and tons of clothes for the baby. She is a lovely knitter, and has made things that would be beautiful, but they are all made of really nasty shiny acrylic and other man made fibres. I have asked DH to ask her very politely if she could possibly knit in cotton/wool, and I have done the same, and have even bought large amounts of cotton/bamboo and wool in suitable colours for her to knit with, as I don't want her to be out of pocket. They have far less money than we do and I know that cotton and bamboo and wool are more expensive to buy.
Despite all of this she pitches up with a new acrylic item every time we see them so has obviously decided to ignore our polite requests, and I know she will take the hump massively if I don't dress the baby in one of the every day when once the baby arrives, but I really, really don't want the baby to wear top to toe acrylic all day! All my baby books say that you should dress the baby in natural fibres so that they can keep cool and evaporate sweat effectively etc.
The background to this is that my DH's parents are very working class and I am very upper middle class so I am worried they think I am a snob as it is, and this will make that worse, but equally, I don't want my baby flickering with static electricity the whole time! Or overheating in a nylon baby grow.......!Am I just being a cow?