Can anyone suggest incontinence pull-up briefs that do not leak when worn overnight?

Working in the incontinence field every day, virtually all of the products designed specifically for both fecal and urinary incontinence are briefs with tabs, with a few things like pads and belted undergarments. No pull up that I know of states in the manufacturer's description that it is for fecal incontinence except a couple by Invacare like the Invacare Value Protective Underwear. That Invacare product is only for moderate incontinence, so it won't last all night. However, you could use a booster pad, different than a normal pad, they're for extra protection. A booster pad for fecal is like the Tranquility TopLiner Booster Contour Pad

That booster pad doesn't have an adhesive strip, I believe, but if you found a way to hold two in place, then you could use two. That would be between 27.2 fl. oz. and 55 fl. oz. of extra protection, using two, depending on which one you choose. A normal bladder holds 16 fl. oz.

You may do better, though with a quality brief that does not say it's for fecal, combining that with one or two of the above booster pads. Examples are the Tranquility Premium Disposable Underwear for overnight incontinence and the Prevail Super Plus Underwear for overnight incontinence.

Be sure and use a good, very, very absorbent booster pad that says that it is specifically for both bowel and urinary incontinence, and make sure you've got a snug fit to keep one or two of them in place and you should be good to go. It's best to change the diaper as soon as you can. Hopefully this helps.

I don't think any of them work as well as they should. If you want to avoid having to wash bedding constantly, you could place bed pads on top of the sheets (either or both the washing kind and disposable kind (aks chucks) and use a waterproof mattress pad under the sheets.
And when removing them, tear them apart at the sides instead of pulling them down to avoid a bigger mess

GustavBob,

Thanks so much for all your helpful info!!

LoveSeniors

We use a sanitary napkin or two in one clients undies. Seems to prevent leakage. We also use chuxs and a draw sheet as extra precaution.

TENA Stretch, Night Super Absorbency is like a pull up with velcro on the sides. This makes them adjustable. They are way more absorbent than pads or sanitary napkins are. You may not even need chux or a liner with these at night. I found them online for special needs.

Mom has PD and no control over her bladder or bowls. I was washing her bedsheets and pillow almost every day. I tried every pullup on the market, that includes ordering online.
What you really need is the plastic covered diapers with tabs. Check out Wellness briefs online. Since I have used these on Mom, over a year now, I no longer am washing wet bedsheets! Even a washable chux under mom couldn't keep her dry. I also line them with an ultimate absorbancy pad for added protection. I put them on her when she is standing up. Then I pull a pair of her cotton undies over them. She has dementia and tries to pick at them during the night. So the undies over them and her arms over the top sheet, which I then tie to the bed rail, works great to keep her from tearing them and getting that filler all over.
Pullups are so much easier to get on and off, but if they are not working, then it's time for the others. Sorry, but I never found a way around it. Good luck!