to put DS in girls' school trousers?

[CamperFan]

DS starts school in September and I really want to get him the M&S "Skinkind" school trousers as they're the only (affordable) cotton trousers I have seen and he has eczema on his legs. However, they are perpetually out of stock. But I've just checked the girls' ones and they are in stock in all sizes. How do school trousers for the sexes differ? Would any 4-5 year olds notice?? Shall I just get one pair while I wait for the boys' to come into stock?

Why not go into M&S and pre order from the store. Take note of the item number.

M&S girls' trousers also tend to have a pink satin-esque waistband lining.

Not ideal for the boys' changing rooms.