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 Sport is a lighter weight, hard-wearing yarn that works wonders for projects where easy-care and durability is a must. Choose from a wonderful selection of colors that range from bright and vibrant to soft pastels; perfect for everything from long lasting hats and scarves to delicate and snuggly soft baby blankets and garments. Brava is also machine washable and dryable, making it a great go-to yarn for charity knitting and crocheting. With so much flexibility, Brava is sure to keep your needles and hooks busy season after season.