But in any case, the supply chains of companies that use overseas materials have been disrupted. With effort, they could probably switch to using materials fro

But in any case, the supply chains of companies that use overseas materials have been disrupted. With effort, they could probably switch to using materials from a domestic manufacturer, but those manufacturers may not have the capacity to satisfy the increased demand. Per the OP, it seems like the limiting factor in production is melt-blown fabric.