Final answer:
The strange man's attire in 'Sir Gawain and the Green Knight' indicates he is of high social status, as shown by his luxurious, well-fitted clothes and fine fur lining.
Step-by-step explanation:
The description of the attire of the strange man in the excerpt from Sir Gawain and the Green Knight suggests a high social status. Nobility and wealth are indicated by his coat and mantle, which are not only tailored to fit closely but also lined with fine furs, a sign of luxury and status during the time the poem was written. The mention of the fabric being noble reinforces this interpretation, as luxurious materials were typically reserved for those of higher social standing in medieval society.