9 Mega = 36 Regular (Based on number of sheets in Charmin Regular Roll). More absorbent so you can use less (vs. USA leading 1-ply bargain brand). 1 Mega = 4 Regular rolls (Based on number of sheets in Charmin Regular Roll). Charmin is safe for your sewer or septic system. Septic safe. More absorbent (vs. USA leading 1-ply bargain brand). FSC: Mix - Paper from responsible sources. www.fsc.org. Rainforest Alliance certified. Protect + Grow + Restore. Learn more at charmin.com. Learn how Charmin helps to protect, grown and restore trees at charmin.com.