My wife and I have been looking for decent waterproof overalls for mud and gunge etc, and i think we've finally found the solution.

https://www.amazon.co.uk/DRY-KIDS-Adults-All-Royal/dp/B07PYXMHVL?ref_=w_bl_sl_ap_ap_web_5359098031

We are delighted with these - had to share the find!

(Repost of an earlier topic removed because of a useless link)

Those look likemthe perfect thing to fill up!
I might have to grab a pair!