a striped silk garment, and siyaraa refers to fabric ribbed with silk thread.
أخبرنا عمرو بن عثمان عن بقية حدثني الزبيدي عن الزهري عن أنس بن مالك أنه حدثني أنه
برد سيراء والسيراء المضلع بالقز
Abu Dawud narrated it in the Book of Clothing, chapter on silk for women, hadith no. 4058, from Amr bin Uthman, with this wording. Ibn Hajar said in Taghliq Taliq 5/63, "Sahih, well known from Zubaydi." Bukhari mentioned it with a suspended chain before hadith no. 5836.