The World Federation One Stop Fiqh

Ruling 157

If a ḥaṣīr21 that has been woven with thread becomes impure and is immersed in kurr or flowing water, it becomes pure after the intrinsic impurity has been removed, it.  However, if a person wants to wash it with qalīl water, it must be squeezed in whatever way possible, even by stamping on it, so that the remaining water separates from it.

21 A ḥaṣīr is a mat that is made by plaiting or weaving straw, reed, or similar materials of plant origin.