Reference for Kelim 26:1
סַנְדָּל עִמְקִי, וְכִיס שֶׁל שְׁנָצוֹת, רַבִּי יְהוּדָה אוֹמֵר, אַף כְּפִיפָה מִצְרִית, רַבָּן שִׁמְעוֹן בֶּן גַּמְלִיאֵל אוֹמֵר, אַף סַנְדָּל לָדִיקִי כַּיּוֹצֵא בָהֶן, הֲרֵי אֵלּוּ מִטַּמְּאִין וּמִטַּהֲרִין שֶׁלֹּא בְאֻמָּן. אָמַר רַבִּי יוֹסֵי, וַהֲלֹא כָל הַכֵּלִים מִטַּמְּאִין וּמִטַּהֲרִין שֶׁלֹּא בְאֻמָּן. אֲבָל אֵלּוּ, אַף עַל פִּי שֶׁהֵן מֻתָּרִין, טְמֵאִין, שֶׁהַהֶדְיוֹט יָכוֹל לְהַחֲזִירָם. לֹא אָמְרוּ אֶלָּא בִכְפִיפָה מִצְרִית, שֶׁאַף הָאֻמָּן אֵינוֹ יָכוֹל לְהַחֲזִירָהּ:
Regarding an Imki sandal [a sandal from the Imki valley, consisting of a piece of leather with attached straps], and a draw-string pouch, Rabbi Yehudah says: also an Egyptian basket, Rabbi Shimon ben Gamaliel says: also a Ladiki sandal [from Ludkia], anything similar to them can thereby be made [susceptible or insusceptible to being rendered] impure or pure without [the aid of] a craftsman. Rabbi Yose said: but are not all vessels able to be rendered [susceptible or insusceptible to being rendered] impure or pure and without a craftsman? Rather, these, even when they are unlaced are [susceptible to being rendered] impure, since a layperson can restore them. They said this [that unlacing something can make it insusceptible to impurity] only regarding an Egyptian basket which even a craftsman cannot [easily] restore.