If this type of product is usually made of EVA, those proposed by the company from Cornuda (Treviso) are in polyurethane.
Some might turn up their noses… because even polyurethane clogs already exist and are produced. Those of Stemma, however, are neither poured nor injected, but sprayed.
With the first two systems, in fact, one side of the product is made in an optimal way, while the other (usually the inside) always shows defects, often hidden with insoles or stockings.
With the spray technique, instead, perfectly reproduced surfaces can be obtained both inside and outside. Looking at them, you notice a sort of (always in polyurethane) stiffer skin, which contains within itself a softer polyurethane that ensures comfort.
A perfect system for professional use footwear, where EVA shows its limits but where polyurethane can ensure durability (it deforms less easily), anti-static and anti-slip conditions.
At Simac, the company has also presented a machine with double ring technology, according to the interpretation of Stemma (with a normal injection cycle on the upper, footwear with rubber soles and midsole with two different density of polyurethane are produced) . The machine, therefore, allows a formed sock to be inserted in the mould in order to obtain a finished shoe in every detail, all this without distorting the normal production cycle. Perfect for military and technical outdoor shoes.