This product looked good and had great potential but still needs work due to the foot not being able to breathe. I lost circulation in my right leg after 6 hours of exercise and a month later my leg is still bruised. Tongue technology needs improvement. The sole is firm but it needs to breathe better if you want to sell it. I would love to try Rebound and make adidas a great squash shoe, just shut down adidas due to this experience.