Radak: They are of the 600 men. They took their wives ¹ and children, for they were confident that they will capture the city.

Rashi: It is the heavy loads that cannot go fast, if the people of the place will chase them.

Radak: It is Kelim and Metaltelim (movable objects). The Targum is Kinyana, like the Targum of Rechush (property or wealth ¹ ) - Kelim, gold, silver and other Metaltelim.

Kli Yakar (Lani'ado) #2: It refers to their wives - "Kol Kevudah Vas Melech Penimah" (Tehilim 45:14). They feared lest people of Michah's city take the women for security until the idolatry is returned.