Tewi has provided us with additional information about the three diapers he photographed in Mongolia.
He notes that none of these diapers are manufactured locally. The Seni diapers are the same international product that we know in the U.S. [Seni diapers are available from XP Medical]. The “Chrysan” and “White You” diapers are Korean products.
Re cost, Tewi advises that Chrysan diapers cost US $ 7.12 for a package of ten or $ 0.71 each. A package of ten “White You” diapers is US $ 8.34 (Mongolian Tug 17,000) or $0.84 cents each.
Regarding performance, Tewi “tested” them when his local chain store stopped carrying his favorite Helen Harper and Seni diapers.

He checked four stores, with no luck. Desperate, he found some Chrysan diapers. While the price is very reasonable, he considers them to be only marginal in performance. He notes that the diapers last no longer than two wettings from urge incontinence before they must be changed
He then tried the “White You” diapers and found them to be much better, although they cost more. He also notes that they are a “tad larger” than the Chrysan diapers.
Tewi then found that his original store had restocked more Seni diapers. However, these are not the best of the Seni brand in terms of absorbency.
The bottom line? Tewi found that, hands down, the best diaper is the Korean 'White You' brand that he gets at the local hospital's pharmacy.
That is good news for travelers. Thank you Tewi!