From the website: Built with Walker Wave platform technology, Ivana features a lightweight sole and a classic loafer upper. So now you can enjoy the style of a loafer with the comfort of a sneaker, making it perfect for any occasion, from workdays to weekends, from commutes to dog walks in the park. Look and feel amazing wherever you’re headed. Extra Roomy Round Toe 3cm/1.2" Heel Height & Toe Spring 205g per Shoe (EU 37) Breathable & Water-Repellent Upper Soft Rounded Edges and Heel Padding Pressure-Relief Perforated Honeycomb-Cushioned Insole Ultra Cushioned & Supportive EVA Foam Anti-Slip Bi-Directional Rubber Outsole Upper Made from Recycled Plastic PET Bottles Packaged with 100% Recycled Cardboard