The outermost covering was made from either badger or seal skin. No doubt its
function was to provide a thick, protective, weatherproof layer over the
Tabernacle. From the outside, this covering made the Tabernacle look ordinary
and unattractive. This is the same that is true of Christ: "He had no
beauty or majesty to attract us to him, nothing in his appearance that we should
desire him." (Isaiah 53:3). But
once inside the Tabernacle (the church, body of Christ), we marveled at His
beauty and glory.
This protective covering reminds us of Jesus' prayer: "My prayer is not
that you take them out of the world but that you protect them from the evil
one." (John 17:15).