The terms 'biodegradable' and 'compostable' are not equivalent or interchangeable. 'Biodegradable' simply means something will be broken down by microbes over time, which is true for most materials on the planet. Since this term applies to almost everything, it is a meaningless claim that has been abused through greenwashing.
In contrast, 'compostable' means something will break down in a defined amount of time and in set conditions (humidity levels, temperature, etc), such as the ones encountered in home compost bins or in composting facilities.
Like any other environmental claim though, it needs to be substantiated. That is why our compostable products are certified to the European Home Compostability NF T51-800 standards or/and European Industrial Compostability EN13432 standards. These testing programs also ensure that the packaging does not hinder compost quality and that the compost produced can safely be applied to land.