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. *