Outer: Organic Swedish vegetable tanned leather. Inner: Organic vegetable tanned leather. Inner sole: Organic vegetable tanned leather. Outer sole: TR. Closing: Lace up. Comfort: Removable inner sole. Cushioning midsole. Organically & environmentally certified, completely free from chrome & other damaging additives. Interior reinforced both at front & back of heel. Shoes should be lubricated with leather oil at regular intervals to resist wetness & retain flexibility. The model can be perceived as small in size. Interior dimensions: EU19 (116mm) EU20 (123mm) EU21 (130mm) EU22 (137mm) EU23 (144mm) EU24 (150mm)