Reebok EasyTone Retone the legs and bum! They work by using pockets of air in 'balance balls' situated in the heel and forefoot of the sole. Reebok EasyTone activate muscles in your leg more than traditional trainers- meaning you can take the gym with you anywhere you go. With Reebok EasyTone Trainers and Reebok EasyTone Sandals available ReeToning has never been so easy!!