from the sole of the user 39 s weight in addition such a dome or igloo exerts a real massaging action on the foot fig7 and 8 show another embodiment of the invention which provides studs 7 distributed all around hole 6 of chamber 9 such studs have the function of breaking the liquid film on the road after a shower avoiding the aqua planing effects fig9 shows a typical distribution of the valves in three significant areas of the sole the illustrated embodiment is that of fig5 and 6 with a circular lip 10 and a central hole 11 it is self evident that the embodiment of fig5 and 6 i e that with igloos the distribution of the igloos on the upper surface of the sole should be such as to ensure an even bearing of the fixed insole which should not be affected of course by the presence of uncomfortable relief on the ground on the other hand it is not necessary that a check valve corresponds to each igloo their number can be limited with regard to that of igloos so as to be only provided in the most suitable spots it is evident that as an alternative to the valves made in one piece and one moulding step along with the sole as described so far the use of valves inserted in the sole may be provided particularly such valves can be made with materials having a specific weight different from.