Keilim 24:13

There are three kinds of sheet: one for lying on is susceptible to midras impurity, one used as a curtain is susceptible to corpse impurity and one used as a tapestry is insusceptible to all forms of impurity.

Keilim 24:14

There are three kinds of cloth: one for cleaning hands is susceptible to midras impurity, one used to cover scrolls is susceptible to corpse impurity and one used as a shroud or to cover the Levites’ harps is insusceptible to all forms of impurity.