Cov qauv sib txawv ntawm nkawm khau muaj cov haujlwm sib txawv. Feem ntau, khau kis las yog siv rau ntau lub sijhawm ua kis las, thiab lawv yog qhov hnyav thiab hloov tau yooj yim hauv kev txav. Txawm hais tias feem ntau ntawm nws cov qauv siv roj hmab outsole, tom qab tag nrho, manufacturers tsis xav txog qhov rwb thaiv tsev zoo thaum tsim thiab tsim cov khau kis las, yog li nws tsis tuaj yeem hnav khau ncaws pob ua haujlwm. Cov khau ncaws pob yuav tsum tsis txhob siv los ua cov khau tiv thaiv insulated.
Cov tsos ntawm cov khau kis las tuaj yeem zoo li hloov qhov xwm txheej no. Nws muab cov yam ntxwv ntawm cov khau kis las thiab kev tiv thaiv kev ua haujlwm ntawm cov khau tiv thaiv. Thaum tsim thiab tsim, cov chaw tsim khoom ntawm cov khau tiv thaiv muaj kev xav zoo, uas tsis yog tsuas yog muaj cov tsos ntawm cov khau kis las, tab sis kuj nce Anti-mite, tiv thaiv tho, rwb thaiv tsev thiab lwm yam kev tiv thaiv kev ua haujlwm, yog li siv cov khau kis las ua khau khiab, yuav tsum tau ua tshwj xeeb, yuav tsum tsis txhob siv cov khau kis las zoo tib yam li khau khiab, nws yog qhov zoo tshaj plaws tsis txhob siv nyiaj pov hwm khau siv ua khau kis las.