Clothes that people wear when they do sports or exercise.
Sportswear is comfortable and made for moving around a lot.
Examples:
I wear sportswear when I go running.
She bought new sportswear for her yoga class.
Sportswear is usually made of special fabric.
I love wearing sportswear because it's so comfy!
My sportswear makes me feel like a superhero.
Sportswear is the best for playing games in.