It means "made of wool" and is usually spelled "woollen". It's similar to wooden, meaning made of wood, or hempen, meaning made of hemp.
Wool
adjetive
Woolen is an adjective, it describes a specific type of noun.She wore a red woolen jacket to school today.
Woolen clothing is hot in the summer--woolen is an adjective.
felt
Woolen (UK woollen) is the adjective form of the noun wool.Woolen (woollen) is also a noun, a word form garments made of wool.
woolen weaken worsen wigeon
Serge and surge
The correct spelling is woolen.
Woolen
wool is the noun woolen adj.
Woolen is the correct spelling.