Sentence:  But, now-a-days, many of them wear their Apparel of a dark brown colour, almost like "Heath", that so, lying in the "Heath-bushes", they might not, in the day-time, be discovered by their Cloaths. Being rather loosly happ'd, than closely covered, with this sort of <WSD>Blanketing</WSD>, they endure the fiercest weather ... 
Meaning of the word marked with <WSD> tags:  Cloth for making blankets.