Rams' Skins
The skin of the sheep, roughly tanned with all the wool on, is the common winter jacket of the shepherd or peasant, the ram's being considered especially desirable (compare Heb 11:37). Hence, the appropriateness of these skins in the covering of the tabernacle (Ex 25:5, etc.).
⇒See also the McClintock and Strong Biblical Cyclopedia.
See TABERNACLE; DYE,DYEING .