If he will tolerate it try a onesie.
He does in winter but too warm now
That looks good Jeany. Bill is now using ordinary PJs again but we have these
http://www.shop.kcsleepsuits.co.uk/mens-all-in-one-back-zip-pyjamas.html
They're good but the short ones look like a good idea.
The long legged ones look less accessible Izzy they might be better for someone who is determined,
If you find something that never leaks, please let us know. That's why people buy waterproof mattress covers and Kylie sheets, because pads mostly aren't enough in the night.