Reply To: Chidushim on Daf Yomi Shabbos 30

Rashi in Eruvain 95,2 explains that the tana kama whose view is that only one pair of tefilin can be saved holds that shabbos is a time for tefilin and therefore, if he saves more than on pair, he violates baal tosif. The Minchas Chinuch mitzva 318,9 deduces (318, letter 9) that if one wears leather shoes on Yom Kippur its considered a burden and he is violating the issur of carrying. Ask the meforshim (see Daf al Daf over there), what is the connection? Wearing tefilin makes it a clothing because of the mitzva if no mitzva because of baal tosif, it becomes a burden whereas leather shoes are clothing by itself, so why would the issur make it a burden?