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 Bulky is a hard-wearing yarn that is sure to work up quickly and works wonders for projects where easy-care is a must. Baby blankets work up quickly for snuggly soft comfort while hats, scarves, and mittens will be sure to withstand daily wear and tear. With so much flexibility, Brava is sure to keep your needles and hooks busy season after season.