Tafsir of Ad-Dukhan 44:53

يلبسون من سندس

Dressed in Sundus, means, the finest of silk, such as shirts and the like.

وإستبرق

and Istabraq, means, silk which is woven with shiny threads, like a splendid garment which is worn over regular clothes.

متقابلين

facing each other, means, sitting on thrones where none of them will sit with his back to anyone else

كذلك

وزوجناهم بحور عين