20 Rials

Oman's switch to hybrid polymer-paper substrate for this denomination was a deliberate hedging strategy — the Central Bank had trialled full polymer on lower values but retained the familiar tactile quality of cotton-fibre stock for higher denominations, with hybrid offering a workable compromise on durability without fully abandoning the traditional feel that Omani users associate with prestige notes.

The TBB#243 reference places this within the 2020 commemorative refresh cycle, though it circulates as a standard issue.