Quoted from the Knit Picks web site:
Versatility meets affordability; Brava is a 100% acrylic yarn that will keep up with all of life’s adventures! Brava Worsted is a hard-wearing medium weight yarn that works wonders for projects where durability and easy-care is a must. With so much flexibility and a wonderful range of bright and vibrant colors, you will find endless possibilities for Brava Worsted. Make hats and scarves to show support for your favorite sports team, gift baby blankets and garments that new parents are sure to love, or simply use Brava Worsted for your charity projects.