the material that allows the hollow vertical configurations 2 2 to compress and later recover their original shape these two cushioning forms are those known in hollow soles in this embodiment a third form is added by filling the internal pockets 2 3 of the hollow configurations of the top half to at least half of their volume or even completely with a shock absorbing plastic material 3 in this way in the step the elastic characteristics of the footwear sole material are combined with hollow vertical configurations 2 2 filled with a specific material appropriate for the mechanical loads of the step so that the impact is absorbed better and the recovery is optimised as well as providing a feeling of comfort and safety to the user in a variant of the above described embodiment the two halves 1 2 are similar that is the bottom half 1 comprises a sheet 1 1 and hollow vertical configurations 1 2 which form internal pockets 1 3 the base being integrated in said sheet 1 1 so that said hollow vertical configurations 1 2 are facing the inside of the sole such that they contact the surfaces of the hollow configurations 1 2 2 2 facing the inside of the sole in each of the halves 1 2 in this case it may be convenient to add an additional sheet 5 acting as a sole in contact with the ground in this variant the hollow vertical configurations 1 2 2 2 are duplicated and act.