Sentence:  [...] the Canadians' [soldiers'] <WSD>mukluks</WSD> and sleeping bags were superior to anything in use. the <WSD>mukluk</WSD>, a rubber-soled boot with a calf-high outer nylon cover, has a thick woollen inner boot that keeps feet warm in the coldest of weather. 
Meaning of the word marked with <WSD> tags:  A laced winter boot resembling a traditional mukluk, with thick rubber sole and cloth upper.