Tea bags are small pouches made of filter paper, silk, or nylon that contain dried tea leaves. They are designed for convenience, allowing users to brew tea quickly without the need for loose leaves or additional equipment. The tea inside can vary widely, including black, green, herbal, and flavored varieties. When hot water is poured over a tea bag, the flavors and nutrients from the tea leaves are extracted, creating a flavorful beverage. Many people enjoy tea bags for their ease of use and portability, making them a popular choice for both home brewing and on-the-go enjoyment.