Earthbreeze Eco Sheets dissolve within seconds in hot or cold water. They work in all machines, HE included. You can even hand wash with Eco Sheets which are Paraben free, Phthalate Free, Phosphate Free, Bleach & Dye Free, Vegan and Cruelty free and also comes in an earth friendly cardboard package instead of a wasteful single-use plastic jug! Cardboard is much more sustainable, biodegradable, and eco-friendly than single-use plastic.