Update: Size 37, 38 and 40 is available immediately (delivery times from 1 - 2 working days).
Upper - 28% Recycled Polyester from plastic bottles, 50% Bio-based Polyurethane (PU), 22% PU. Bio-based means that the material is derived from residual plant-based materials (mostly field corn), coming from renewable sources. The material is 'PETA-Aproved Vegan' certified.
Insole - Microfiber, 60% Polyester and 40% Polyurethane (PU), breathable material with a high absorption capacity.
Outer sole & Heel (5 cm high) - Thermoplastic Rubber (TPR), recyclable material