"As-salāmu ʿalaykum wa raḥmatullāh. I know that men are prohibited from wearing silk, but I am unsure about using silk items such as pillowcases or bed sheets. Is it considered haram, makruh, or permissible for men to use silk in this way?

Ustadh AbdulAziz al-Haqqan

If it is natural silk then it is forbidden otherwise it is fine.