They are made of 100% high-grade natural biodegradable wood pulp filter paper, UV-sterilized and IR-dried, free of chlorine and other chemicals.The filter paper has strong permeability and high temperature , which allows tea to easily and quickly infiltrate to obtain a richer tea.Tea bags are easy to fill and remove and can be used once. Designed with drawstrings, they are safe, leakproof, and durable.Widely used tea filter bag, suitable for tea, coffee, medicine, fragrant tea, herbal tea DIY, herbal bag, foot bath bag, hot pot bag, soup bag, freshener bamboo charcoal bag, sachet, camphor ball storage, desiccant etccolour:WhiteMaterial:papersize:5.5*7cmPackage Contents:500 * disposable tea bagsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.