Joe's USA Lacrosse Balls - All Colors (also used for Back Massage Ball Therapy) Joe's USA Lacrosse Balls - All Colors , Vulcanized rubber, Colors: Yellow, White, Orange, Red, Blue, Pink, Violet, Multicolor. (also used for Back Massage Ball Therapy) Works great for massaging out trigger points/muscle knots, Lacrosse Balls work wonders for back pain, Lacrosse Balls work great for back massage, Lacrosse Balls work great for dog toy balls lacrosse ball is good as both equipment for the game lacrosse and an excellent toy for the dog *Always consult your doctor before trying something new.*Always consult your doctor before trying a new back pain treatment. *