Extend your growing season and harvest vegetables sooner. Plant tomatoes, peppers, cucumbers and melons up to 2 months before the last frost. The red color of Kozy Coats enhances the ripening process to increase production. Simply fill the chamber openings with water. Heat is stored in the water chambers during the day and slowly releases during the night to protect the plants. It is reusable, too; just empty the water and store.