I think you are talking about a diaper "doubler". I googled and found this one. I don't have any recommendations, but I have heard of them.
Do you CD G? If so, I've found that there's only so much you can stuff into the pockets
Don't know about sposies.
Yes, it's for Cloth diapers, tho. Not sure if they'll work for disposables, but I guess it wouldn't hurt to try.
Here's a website for a CD retailer in my town.. she has all kinds of info on her website: www.babycottonbottoms.com
They make disposable doublers for disposables. Actually, I think they started out as disposable doublers for cloth back in the 70's, then were used in disposables - but I could be wrong.
You could use a cloth doubler, but you would have to wash it in a CD friendly way (CD friendly laudry detergent and no softner) or it would not absorb and might even burn little G's lady bits .
2770 diaper booster pad MSC326005 double-ups 2072 mini booster pad no adhesive strip with adhesive strip with adhesive strip The Diaper Booster Pads, Double-up Liners and the TopLiner Mini Booster Pads are an extra absorbency pad insert for use in any diaper, training pant or any other absorbent undergarment when extra leakage protection is needed, such as overnight, shopping trips or the unavailability of a changing room. thereby extending the use of the diaper providing a convenient and economical way to save on product usage.-->The Diaper Booster Pad is similar to the original diaper doubler.The Double-Up is similar to the original with an added adhesive strip. The Mini Booster is very fast absorbing.Because the Topliner Mini Booster is smaller it must be placedto the front for boys and the middle for girls.