In serial shoe production, shoe soles are generally made by injection or compression moulding techniques that requires 2 moulds per size, which means per example that 14 sole moulds are needed to make shoe model in seven different sizes. This is unsustainable and risky for small manufacturers. The shoe sole system developed by Velt is modular, making it possible to produce all shoe sizes and widths with just 3 moulds: a back part for the heel, and 2 front parts for the arch the toes.
