Is a bride's chair susceptible to midras impurity?
Halacha 1 lists the bride's chair among items that are pure (like the bier and accessories of a corpse) — these do not serve the regular sitting needs of living persons.
Question 2
A straw mat versus a reed mat — which is susceptible to midras impurity?
Halacha 12 states that a straw mat is susceptible to midras impurity, while one made of reeds or grass is pure — because reeds and grass are not fit to serve as comfortable supports.
Question 3
A walking stick used by an elderly person — is it susceptible to midras impurity?
Halacha 16 states that a walking stick used by an old man is absolutely pure, because it is only an aid — not a sitting or lying surface.
Question 4
Heads of beams that were hewn out — when are they susceptible to midras impurity?
Halacha 10 states that heads of beams hewn out with the intent that one sit upon them are susceptible to midras impurity. Without that intent, they are pure even if actually used as seats.
Question 5
The saddle-blanket of a donkey — is it susceptible to midras impurity?
Halacha 19 lists riding items including the saddle-blanket of a donkey as susceptible to midras impurity because they are surfaces upon which one rides.