What is the minimum size for a hide to be susceptible to midras (zav-support) impurity?
Halacha 1 states that hides susceptible to midras impurity are not susceptible unless they are of minimum size: five handbreadths by five handbreadths.
Question 2
A shoe on a shoemaker's mold that has not yet been worn — is it susceptible to midras impurity?
Halacha 4 states that a shoe on the mold, even though it has not been worn by a person yet, is still susceptible to midras impurity — the fashioning tasks are complete.
Question 3
Can a person impart midras impurity to a surface that belongs to someone else?
Halacha 6 states that a person does not impart midras impurity to a surface on which one lies or sits unless it belongs to him.
Question 4
A hide susceptible to midras — does it become susceptible through thought (intent) or must a deed be performed?
Halacha 5 states that hides fit to become susceptible to midras impurity become susceptible through thought (designation) alone.
Question 5
When does a midras-impure hide being cut into straps finally become pure?
Halacha 7 states that when a hide contracted midras impurity and the owner began tearing straps from it, it remains impure until its size is reduced to less than five handbreadths by five handbreadths.