Soft, breathable and stretchy, modal is a popular fabric choice for sportswear, underwear and pajamas. Modal is a type of viscose made from beech wood. It is a slightly higher quality fabric as it is smoother and more durable than regular rayon with little wrinkling.
Also, it’s pretty eco-friendly. Since beech needs much less water to grow than cotton, modal is quite sustainable to produce and is even biodegradable on top of that.