What are your sachets made out of?

To minimize waste, our teas are packed in a sachet that is certified ASTM D 6400 compostable. The material is made from plants, not petroleum. It will biodegrade into water and CO2 after about one month in a compost-rich with microorganisms at a temperature of 122°F (50°C) and 80 percent humidity. (So home composts likely will not provide the needed environment for the decomposition of these sachets.) This material is safe and non-toxic and doesn’t  break down or melt in hot water.