My mum used to be a "snazzy dresser" - everything used to match, beautiful matching shoes and handbags, beautiful wedding attire(she was married 3 times so the she had only the best outfits for the last 2). Now my Mum aged 91 is in a fairly humble, plain but caring residential care home and she seems to have "lost it"! I will often find her pairing two very unmatching things together. Sometimes I try to sort out her wardrobe into groups but the grouping goes astray. Sometimes the carers help her, sometimes not, although I am not entirely sure. Just sometimes she is better dressed than other times. My husband picked her up to take her to her church on Sunday. He says she was wearing her skirt inside out. He let it pass.....
One thing is for sure now is that she nearly always has dinner spills on her clothes somewhere. I can see there would be no point in carers trying to change this as there are, of course, 3 meals a day. If it is bad when I arrive I just try to suggest changing something and blame her eyesight(which is bad too actually).
I would say you need nothing which is uncomfortable but having said that it may be important to retain a little of what your mother liked or valued. I kept some of my mum's pretty summer skirts for her to wear and she said she wouldn't be wearing any of them at the start but I was wise not to listen to her too much as she is wearing them now. They are actually the best thing with her swollen and bound legs.
I notice also she doesn't think she wants clothes for the next season. So suggesting finding some loose winter trousers for warmth is rejected because she, I realise, seems onlyto have the real ability to think how she feels now, in summer, and can't remember what feeling cold was like and how there would be any need to dress differently. We haven't yet got to the stage of jogging bottoms but they certainly have their place.
In terms of washability some fabrics are easier than others too. It depends on who is washing, of course, and if any ironing will take place. I am not too keen on man made fibres but they wash easily and Mum seems to be wearing them more.
I did send all those posh outfits to charity and much more too. One thing I have found also is that Mum finds too much in the wardrobe confusing.Less seems to be more for her, not too many choices. I actually have retained her winter clothes in a wardrobe in my own house and will switch them again when the season starts to change.