We use Taiwanese tea leaves with good infusion properties. Just pour in hot water and you'll have delicious oolong tea. It has little astringency and is a flavor that is widely enjoyed by people of all ages, from children to the elderly. If you brew it in cold water, you can enjoy delicious cold-brewed oolong tea. Product contents: Tea (semi-fermented tea). Instructions: Store away from direct sunlight and in a cool, dry place.