Blackout fabric is an opaque fabric with heavy microfiber that blocks light. This blackout lining fabric for curtains is usually made from polyester or cotton. You can shop blackout fabric by the yard to design window treatments, add lining to quilts and more. Blackout fabric is an opaque fabric with heavy microfiber that blocks light. This blackout lining fabric for curtains is usually made from polyester or cotton. You can shop blackout fabric by the yard to design window treatments, add lining to quilts and more.
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