Sheath

Thread fundamentals and construction
The outer fibre layer surrounding the core of a core spun thread.
Also known as
Covering; fibre sheath
Not to be confused with Do not use “coating” unless an actual coating is meant.
Translations
DE Mantel / Ummantelung
FR Gaine
ES Cubierta
IT Guaina
CN 包覆层
VN Vỏ bọc