Edible kelp is a marine macroalgae. This variety is sourced from Penobscot Bay, Maine, by Atlantic Holdfast Seaweed Company. It forms dense underwater forests in areas characterized by deep swells and active surf. They describe the harvest as a "rodeo-esque balancing act" between the algae, the harvester, and the incoming waves that push the boat towards nearby rocks and ledges.
Added to a pot of beans, kombu vinegar will reduce cooking time, thicken the texture, and enrich the overall flavor of the finished dish.
Seaweed is both the first known multicellular organism on the planet, and the first organism known to reproduce sexually. This vinegar is raw and alive so it will grow another mother if you leave it open.