quilted northern ultra soft & strong toilet paper, 6 double rolls. quilted northern ultra soft & strong toilet paper offers a comfortable clean you can count on with its signature 2-ply softness and flexible strength. it has two soft and durable layers that flex and hold up – because you should not have to choose between comfort and strength. quilted northern ultra soft & strong is biodegradable – it’s flushable and septic safe for standard sewer and septic systems. quilted northern toilet paper is sustainable forestry initiative (sfi) certified. for more than 100 years, quilted northern bathroom tissue has stood for softness, strength, and overall quality and comfort.