Well, that will depend on the conditions they’re in. In a ‘standard’ home compost, the compostable courier satchels have been certified (AS5810 -2010) to biodegrade within 180 days. Under commercial composting conditions, it would happen much faster, and as litter (e.g. under a tree) it would happen slower, but it will happen. The Australian Standard is one of the most rigorous in the world and includes a worm toxicity test which means that our comPOST Packs are safe to be eaten by worms.