noun which may take the genitive case particle 'no'
superfine; extra-fine; extremely thin
Describes something very fine or thin, such as fibers, threads, tips, or particles. Often used as a no-adjective in technical or product contexts.
This pen can draw superfine lines.
A new material using extra-fine fibers has been developed.
extra-fine woollen yarn
Specifically refers to a type of very fine wool yarn, often used in knitting or textile contexts. Less common than the general adjectival use.
This sweater is knitted with extra-fine woollen yarn.