Dropps laundry pacs are tough on dirt, but easy on your favorite garments. Simply toss the pac directly into the washer drum (1 pac = 1 load) and it dissolves completely. Dropps laundry pacs are compatible in HE (High Efficiency) and standard washers. Dropps laundry pacs clean all fabrics and all colors in all temperatures (cold or hot water). The Dropps formula is Phosphate-free, enzyme-free and biodegradable. And, it’s safe for septic tanks and gray water systems. The Dropps Fresh Scent, Scent + Dye Free, and Baby formulas are approved by the EPA’s Design for the Environment (DfE) program.