Helooo myofascial release!
The lacrosse ball enables you to get those hard to reach spots where we hold alot of tension and knots and strecthes, rollers spikey balls aren't quite able to help..
Especially great for the back, you can even use it against a wall to loosen up chest and shouler muscles, as the ball rolls so smoothly making it much easier to use than a spikey ball.
Also excellent for the tight glutes and hip - pretty much everything - this is the one and only ball you'll need in your dance bag.
 
As it doesn't soften under pressure, lacrosse balls can be used as a powerful massage tool that can help relieve pain and improve function and mobility in sore, tight muscles.

If you haven't used a lacrosse ball (you're missing out but) nows your chance! You will LOVE IT.