Study Guide Shabbat 28 Today's shiur is dedicated in memory of Freidl bat Meir and Rivka z"l, Frieda Carlin, by Rikki and Alan Zibitt on her 4th yahrzeit, and by Rachel Sabbath beit Halachmi in honor of her husband Ofer her ezer imadi and forever chevruta.  From where do we learn that from natural materials, only flax can create impurity of a tent over a dead body? It is learned out from the mishkan (Tabernacle). Does a tent/covering made from non kosher animals also create impurity of a tent? Is the tachash that Moshe used to make a covering for the mishkan a domesticated or not domesticated animal? Kosher or not kosher? If one takes a cloth and folds it into a wick but doesn't yet singe it, is it susceptible to impurities? Can one light with it for Shabbat? There is a debate between Rabbi Eliezer and Rabbi Akiva. The first explanation of each opinion is brought.