שֵׁשׁ־בְּרִקְמָ֤ה מִמִּצְרַ֙יִם֙ הָיָ֣ה מִפְרָשֵׂ֔ךְ לִהְי֥וֹת לָ֖ךְ לְנֵ֑ס תְּכֵ֧לֶת וְאַרְגָּמָ֛ן מֵאִיֵּ֥י אֱלִישָׁ֖ה הָיָ֥ה מְכַסֵּֽךְ׃
你的帆是用埃及帶繡花的細麻布做的，作為你的旗號；你的篷蓋是用以利沙海島的藍色和紫色布料做的。
Ibn Ezra
From a creature that was known in those days. As it is written, "and gave you sandals of tahash to wear (Ezek. 16:10)." Therefore, it was already known.
Rashbam
בגדי שש, the finest Egyptian garments made of superior linen. We know from Ezekiel 27,7 that such garments formed a well-known Egyptian export.