I suspected as much. I did ask him whether they actually wore slippers last time (2 years ago) - I sent slipper socks that time - and he said he did. I can't imagine he did so without nagging, so if they are forced to wear them, and I send something uncool, then he will hate me forever..
LIZS - he hates flip flops and would fall over his feet even more than usual
At home he wears no shoes indoors, and his default slobbing around the garden footwear is crocs, which I won't let him go out in. I did suggest winter crocs because then I could "inherit" them as slippers for me but I have no idea if that would be social suicide or not. They are not a streetwise bunch, being very much country mice, but are mostly older and slightly more image-aware than DS is.
OK, so I seem to have fashion crises on behalf of DS only when he goes on school trips but hoping someone can inspire me.
3 week residential trip - packing list includes slippers - DS does not own slippers and I have no idea what would be considered OK or otherwise by preteen boys (and girls). DS is more aware than he used to be - he announced that only "dweebs" would wear school games kit to pre-season training (conveniently ignoring the fact that he did exactly that last year...) so he does care and I would like to get it right.
So - if your preteen wears slippers, what sort of slippers do they wear?!