noun
figured habutae; crest-decorated habutae silk
A high-quality habutae silk fabric with woven crests or patterns, traditionally used as lining for fine kimono.
この着物の裏地には紋羽二重が使われている。
This kimono is lined with figured habutae silk.
羽二重 is a plain, high-quality habutae silk, while 紋羽二重 specifically has woven crests or patterns.
Compound of 紋 (crest, pattern) and 羽二重 (habutae, a type of silk fabric). The exact historical derivation is uncertain, but the term directly describes the fabric's decorated nature.