[user104658]

Originally Posted by Cherie

I dont know what a knee grow hem is, like do your knees grow, its very odd wording to have on a pair of trousers

Pretty sure it's two separate terms that unfortunately look like one because of how the online listing name is formatted. It's;

Reinforced knee
(obvious what this is)

Grow hem
(I did have to look up, but it basically means there's an upturned but of fabric at the bottom that can be unpicked and restitched to make them longer. A "Hem that can grow as the child gets taller", if you will).

Poor layout as much as anything. They could change it to "grow hem reinforced knee" and it would all have been fine.