The t-shirt will be a birthday gift for who is turning 24 year old. It also be worn by who is proud of their age and wants to show it off. The t-shirt will be a souvenir for someone who was born in 1999. The t-shirt can also be worn by someone who is a fan of vintage clothing or who likes to collect limited edition items!.The shirt is made of 100% cotton and is machine washable. It is a comfortable and stylish way for you to celebrate the special day.