Single sheets that don't come off

[Routerooter]

DS (16) can't keep any sheets on at night! His pillowcase, duvet cover and fitted sheet will come off in the night. I don't know how this happens, but I'm sick of arguing with him about it.

Can anyone recommend any zipped up pillowcases, duvet covers and bottom sheets, please? I bought him some plastic corner clips, but they broke.

Thank you

You can get better clips that look like braces. They're elastic with metal clips on the end and they work very well. Temu / Amazon etc have them called sheet suspenders.

zip on duvet cover.
I'm just about to sew one on for dd as the poppers on her favourite duvet cover just pop open

Rise and Fall fitted sheets are great

IKEA do a deep fitted sheet which stays on the bed well.

And the single white ones are on offer at £4 at the moment.