Reference for Kelim 26:4
סַנְדָּל שֶׁנִּפְסְקָה אַחַת מֵאָזְנָיו וְתִקְּנָהּ, טָמֵא מִדְרָס. נִפְסְקָה שְׁנִיָּה וְתִקְּנָהּ, טָהוֹר מִן הַמִּדְרָס אֲבָל טָמֵא מַגַּע מִדְרָס. לֹא הִסְפִּיק לְתַקֵּן אֶת הָרִאשׁוֹנָה עַד שֶׁנִּפְסְקָה שְׁנִיָּה, טְהוֹרָה. נִפְסַק עֲקֵבוֹ, נִטַּל חוֹטְמוֹ, אוֹ שֶׁנֶּחֱלַק לִשְׁנַיִם, טָהוֹר. סוֹלְיָם שֶׁנִּפְסַק מִכָּל מָקוֹם, טָהוֹר. מִנְעָל שֶׁנִּפְחַת, אִם אֵינוֹ מְקַבֵּל אֶת רֹב הָרֶגֶל, טָהוֹר. מִנְעָל שֶׁעַל הָאֵמוּם, רַבִּי אֱלִיעֶזֶר מְטַהֵר, וַחֲכָמִים מְטַמְּאִים. כָּל חֲמָתוֹת צְרוּרוֹת, טְהוֹרוֹת, חוּץ מִשֶּׁל עַרְבִיִּין. רַבִּי מֵאִיר אוֹמֵר, צְרוֹר שָׁעָה, טְהוֹרוֹת. צְרוֹר עוֹלָם, טְמֵאוֹת. רַבִּי יוֹסֵי אוֹמֵר, כָּל חֲמָתוֹת צְרוּרוֹת, טְהוֹרוֹת:
Regarding a sandal with a hole [for a strap] that was broken, if one fixed it, it [retains prior impurities and thus] is impure with <i>midras</i> impurity [a type of impurity due to being sat on by certain types of impure individuals, rendering something an Origin of impurity]. If the second hole was broken and one fixed it, it is pure from [and can no longer retain] <i>midras</i> impurity, but is [still susceptible to be being rendered] impure from contact with <i>midras</i> impurity. If one was unable to fix the first [hole] before the second was broken, it is pure. If its heel broke off, or if its toe-piece was removed, or if it was split in two, it is pure. A heel-less slipper that was torn anywhere is pure. A shoe that was diminished [by damage], if it cannot hold the majority of the foot, it is pure. Regarding a shoe [still] on the last, Rabbi Eliezer considers it pure [i.e. insusceptible to impurity], and the Sages consider it impure. All [punctured] water skins which are tied up in a bundle are pure [insusceptible to impurity, due to being punctured], except for Arabian ones [since their ties are stronger]. Rabbi Meir says: if [they are tied in] a temporary bundle, they are pure; if [in] a permanent bundle, they are impure. Rabbi Yose says: all water skins tied up in bundles are pure.