Blood sac

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A blood sac is a junk item in Fallout 4.


The blood sac (not to be confused with the blood pack) consists of the severed abdomen of a bloodbug, filled to bursting with blood drained from the bloodbug's latest prey. It is a source of antiseptic and fiberglass, possibly as a result of the bloodbug's mutant biochemistry mixed with the blood in its gut.


The blood sac can be broken down into its individual components for use in crafting:

Blood sac (1)
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levelIcon level

It is also used in crafting Skeeto Spit at a chemistry station.


Although they cannot be found in the world, blood sacs are dropped by bloodbugs and super mutants. They can also be found in meat bags.

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