This verse mentions two more layers for the tabernacle, not just one. (Revised Standard Version is a mistranslation; see below.) And you shall make for the tent is literally “And you [singular] shall make a covering for the ʾohel.” This third layer is to be a covering for the second layer, which is called a “tent” in verses 11-13. For tanned rams’ skins, see the comment at 25.5.

Revised Standard Version suggests there is only one covering mentioned in this verse, made from tanned rams’ skins and goatskins. However, the word covering is repeated for goatskins as well. The second phrase is literally “and a covering of skins of techashim down from above.” New Revised Standard Version has now corrected the translation: “You shall make for the tent a covering of tanned rams’ skins and an outer covering of fine leather.” As explained at 25.5, the meaning of tachashim is not certain, but it was probably not a goat. (See the description there.) Contemporary English Version, New Jerusalem Bible, and New Revised Standard Version follow Good News Translation in translating “fine leather.” Translators are urged to follow these translations and use the equivalent of “fine leather.” Contemporary English Version‘s model is clearer than Good News Translation‘s: “Make two more coverings—one with ram skins dyed red and the other with fine leather.”

Quoted with permission from Osborn, Noel D. and Hatton, Howard A. A Handbook on Exodus. (UBS Helps for Translators). New York: UBS, 1999. For this and other handbooks for translators see here .