The white tank top worn underneath is from GU. If you'd like, I can include it as well. The sweater is made of acrylic, so it won't shrink when washed in a washing machine, and it's easy to wash. It doesn't feel stiff, but rather has a soft, fluffy texture, and is light and easy to wear. It's an adult's S size, but it can also be worn by a girl who is 160 cm tall.