These bags are used to hold a mixture of 1-3 kinds of tea leaves or dry herbs or plants. Sealing method: sealed with rope, drawstring closure. Suitable for tea, spices and powder, These bags are used to hold tea leaves or dry herbs or plants, No pollution to our environment. High strength, good toughness, heat resistance. Non- and harmless to our body. Because the small bags are to boiling and the material is thin, it can effectively maintain the flavor and make delicious soup. These tea bags are manufactured with the highest quality. You don't need to heat them to seal, just pull the rope and tie a small knot.