Safofin hannu masu dumi ba wai kawai suna kawo zafi ga hannayenku ba, amma saboda ƙirar maɓallin ɗin da aka dinka, kuma yana iya buɗewa azaman ƙaramin kushin dumama, matashin wurin zama, matashin baya, dumama hannu, da dai sauransu Yin amfani da fasahar dumama fim ɗin carbon crystal, yana zafi da sauri da sauri. a cikin dakika 3, yayin da kwalabe na ruwan zafi na gargajiya suna buƙatar ƴan mintuna na lokacin dumama.Kushin dumama yana da yanayin zafi guda uku: 140°F/60°C (ja), 122°F/50°C (fararen), 104°F/40°C (blue).Cikakke don kare hannayenku daga sanyi a cikin yanayin sanyi, yana ba ku damar jin daɗin dumin lokaci yayin kallon talabijin, zango ko waje.An ƙera safofin hannu masu zafi don zama marasa ruwa kuma an yi su da kayan aikin bazara, wanda yake da laushi da nauyi, amma kuma yana da dumi sosai.