A duffelbag is a container item.
A duffelbag can be equipped on the back, allowing the player to equip other items in their hands at the same time. It is one of the poorer wearable baggage items with stats exceeding only the schoolbag.
Duffelbags can spawn with:
It can usually be found inside wardrobes, along with other bags such as the big hiking bag, normal hiking bag and schoolbag.
From newitems.txt (Project Zomboid directory/media/scripts/)
WeightReduction = 65,
Weight = 1,
Type = Container,
Capacity = 18,
DisplayName = Duffelbag,
Icon = Duffelbag,
CanBeEquipped = Back,