Answered by Shaykh Faraz Rabbani
Is it halal for men to pray on silk prayer rugs?
Walaikum assalam wa rahmatullah,
It is haram for men to wear silk, in any way. As for using silk, such as for rugs, curtains, blinds, and the like, this is all permitted. [Ibn Abidin, Radd al-Muhtar, Kitab al-Hadhr wa’l Ibaha fasl fi al-lubs’]