Joggers for my teen?

[Polkadotpjs]

Can't afford branded ones for him to grow out of in 10 minutes flat and usually buy Primark for park messing about with a couple of nice pairs for going out.
But he's 5'3 now, nearly 5'4 and my usual
Go to places stop at age 13. Anywhere online I've not thought of? Oh and they need to be slim fit ....help please! Oh and I must order my new knickers - still not done it

Ignore that. Found some on Asda which might be ok for him to trash...no doubt he'll say they're trash too!

Asos do good men’s joggers from an xs and found some for DP in tesco last week for £10 which he loves but only saw a size s there!

A bit unsure of those brand at the moment as there is some controversy on if they are paying a fair wage or not. So you might want to read up first.
But Boohoo man has been popular with the teens at the school I work at. Slim fitting joggers in lots of styles and matching hoodies/sweatshirts by thr look of them all.