We take the word of our shipping bag and shipping label suppliers that our shipping bags & labels are home compostable. In their own words:
In a home compostable environment, the satchels have been certified to biodegrade within 180 days. Under commercial composting conditions, it would happen much faster, and as rubbish, the compostable process would still take place but it would happen more slowly. Having passed the worm toxicity test, these satchels can also decompose in worm farms.
We keep looking for other packaging and labelling but always home compostable and who knows what the future will bring as it is a fast moving world.