Sentence:  Nor ſhould it prove thy leſs important Care, / To chuſe a proper Coat for Winter's Wear. / ... / True "Witney" Broad-cloath with it's <WSD>Shag</WSD> unſhorn, / Unpierc'd is in the laſting Tempeſt worn: ... 
Meaning of the word marked with <WSD> tags:  Matted material; rough massed hair, fibres etc.