A compostable bioplastic bag, as the term explains by itself, is one that composts easily and quickly. It has an ‘end-of-life’ value to it. Upon coming into contact with soil with its inherent microorganisms and humidity, such a bag breaks down into compost that serves to add to the soil’s quality, rather than spoilt it. This is why a compostable bag is certified as the eco-friendly alternative to the commonplace, familiar plastic bag.