Disposable Inserts are made of cellulose, wood fluff pulp, and super absorber. That's it. They're elemental chlorine free, latex free, perfume free and dye free. The cellulose and wood fluff pulp comes from sustainably grown and harvested softwood. Super absorber is sodium polyacrylate (SAP) and is a non-toxic water absorbing polymer. Disposable Inserts can be composted (wet ones only) or flushed down the toilet, following the instructions on the packaging of course.