1、Fabric Composition Matters: Our bags are made of TUV certified food grade polyester. Fine mesh polyester not only filters well, but also allows adequate drainage.2、High Efficiency Filtration: Some hairy tissues absorb and retain the tips of grains, which cannot be cleaned well. Our bags are very soft, and there is no loose fiber under the microscope. Select our bags to filter all small particles to improve efficiency, clarity and drainage performance.3、Safe to Boil: The polyester material of our brew bag has a heat resistance of 248℉ and can withstand boiling, which will be your last preparation bag.4、Durable: We use durable polyester, which is strong, resistant to stretching and shrinking, and wear proof. Each suture is reinforced and is not easy to tear or break. The reinforced double seam edge can accommodate many grains.5、Quick and Simple Cleaning: The fabric is free of loose fibers. Cleaning is very easy. It will dry quickly when hanging, because it does not absorb water. The seams are outside and there are no particles in the bag.