How do you answer que ropa llevas hoy?

"Que ropa llevas hoy?" means "What are you wearing today?

The answer, naturally would be "I am wearing X", or "Llevo X"

Some things worth wearing includes

Pants/trousers = Pantalones

a shirt = una camisa

a long-sleeve shirt = una camiseta

Socks = Calcetines

Shoes = Zapatos

a dress/skirt = un vestido/una falda