Clothes 14-15 years (Netley Abbey SO31)

My son is disabled money is tight, I get what I can but they don't last long as he chews everything. Needs most thing pjs more than rest , he wear tracksuit bottoms because he wears pads and easier so anything that could be offered would be greatly appreciated he doesn't wear jeans or cargo trousers too awkward . He growing and just seeing if people have anything they can help us with please he goes to school near general hospital so if near there I can collect to. Thank you for reading