From him, from Safwan, from Abdullah ibn Bukayr, who said:
I asked Abu Abdillah عليه السلام, peace be upon him, about the ‘shadhakunah’ (a type of thick woolen or felt garment) that is affected by a wet dream, may one pray upon it? Imam عليه السلام said: "No."
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 397