felted
adjective
[ ˈfɛltɪd ]
• covered with felt.
• "a felted roof"
felt
verb
• make into felt; mat together.
• "the fibres are shredded and felted together"
• cover with felt.
• "it wasn't long before we had felted the roof making it totally watertight"
Origin:
Old English, of West Germanic origin; related to Dutch vilt, also to filter.