One of the things that may not be sent as a gift on Yom Tov is “spiked sandals”.
Question: Why not?
Response: Because of an incident that once happened [070].
Abayye: One may not wear a spiked sandal, but it may be handled. It may not be worn: because of that incident. It may be handled: Since the Mishnah [070] says that it may not be sent, so obviously it may be handled.
Mishnah 070: An unsewn shoe may not be sent.
Question: Isn’t that obvious?
Response: This is discussing where it is already loosely stitched.
Mishnah 070: Rabbi Yehuda: Nor a white [undyed] shoe which needs a craftsman to complete it..
Beraisa: Rabbi Yehuda permits a black shoe [even though it hasn’t been polished], but he forbids a white shoe because it needs the lump of black clay. Rabbi Yosi forbids a black shoe because it needs to be polished.They’re not arguing, they’re discussing different types of shoes. In Rabbi Yehuda’s region the fleshy part of the leather was inside the shoe, but in Rabbi Yosi’s region it was outside and was very unsightly even after it was blackened, as long as it was not polished.
Mishnah 070: This is the rule: Anything that can be used on Yom Tov, may be sent.
Rav Sheishes permitted the Rabbanan to send Tefillin as a gift on Yom Tov.
Abayye: But Tefillin cannot be used on Yom Tov?
Rav Sheishes: It means: Anything that can be used [during the weekdays], may be sent on Yom Tov [Tefillin is not handled on Shabbos and Yom Tov, but its not really muktzeh].
Abayye: Since we’re discussing Tefillin, we’ll say something on the subject: If a man was walking on the road, wearing Tefillin, and the sun began its descent [according to Rashi, this is erev Shabbos, but others explain that even during the week, one shouldn’t wear tefillin at night], he should cover his Tefillin with his hand until he gets home.If he’s sitting in the Beis Medrash [which was outside of the town], and Shabbos began to come in: he should cover his Tefillin with his hand until he gets home. 
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