From Longman Dictionary of Contemporary Englishski bootˈski boot noun [countable] 
DSOa specially made boot that fastens onto a ski
DSOa specially made boot that fastens onto a skiExamples from the Corpus
ski boot• The concept of assessing foot volume instead of width to achieve a good fit is another idea borrowed from ski boot technology.• Salomon's radically different Adventure 7 boots, using even more ski boot technology, are still eagerly awaited for test.• This year, however, Lowa have produced a remarkable ski boot range. 