Stapling assemblies for use with a surgical stapler are provided. In one exemplary embodiment, a stapling assembly can include a cartridge and a knitted adjunct that is configured to be releasably retained on the cartridge. The adjunct can have a tissue-contacting layer formed of at least first fibers, a cartridge-contacting layer formed of at least second fibers, spacer fibers intertwined with and extending between the tissue-contacting layer and the cartridge-contacting layer to thereby connect the tissue-contacting and cartridge-contacting layers together, and at least one fiber interconnecting at least a portion of a terminal edge of each of the tissue-contacting and cartridge-contacting layers to form a finished edge that substantially prevents fraying thereof.