DDS :
The Dual Duro System (DDS) is an insole with 2 different EVA hardness levels; one placed in the first quarter of the shoe with a density of 80, and the rest at three quarters of the insole with a density of 60. This way the sensibility remains on the toe area while the heel remains better cushioned. This insole mold is free of charge and we give it to you as an option to increase your product’s features.