Ko-Ko Gro Briquette, Derived From COIR, Fibers Of Coconut Husks, Totally Organic, Peat Moss Replacement For Use In Mulching, Potting Soil Medium & As A Soil Amendment For Remedying Poor Soil Quality, Compact, Lightweight, Easy To Carry, Expands With Water, Absorbs 10 Times Its Weight In Water, Requires Less Irrigation, 100% Renewable.