Wearing [garments of] fine silk and brocade, facing each other. Ad-Dukhan 44:53 ⧉
Tafsir:
سُندُسٍ وَإِسْتَبْرَقٍ... fine silk and thick silk.... - Ad-Dukhan 44:53 ⧉) Both the words refer to 'silk'. The word sundus refers to "fine silk" and the word istabraq refers to "thick silk".