a. 毡制的, 粘结起来的, 用毡覆盖的, 制成毡的

[ adj ]
made by combining fibers with a binder using heat and pressure
<adj.all>
felt is a felted cloth

Felt \Felt\, v. t. [imp. & p. p. {Felted}; p. pr. & vb. n.
{Felting}.]
1. To make into felt, or a feltike substance; to cause to
adhere and mat together. --Sir M. Hale.

2. To cover with, or as with, felt; as, to felt the cylinder
of a steam engine.