Brand New and High Quality. Made of 100% premium nylon material, it contains no toxic chemicals or bleach, making it safe and healthy to use. Easy and convenient to insert or remove from the teacup with a drawstring. Heat-resistant and abrasion-resistant, it features high performance, fine craftsmanship, practicality, and durability. The opening is easily resealable. A nylon sealer is required to seal the bag. Perfect for holding tea leaves, herbs, spices, or flower bouquets for home tea brewing, stews, marinades, soups, and stews.