S Wave 1' lace-up sneakers in a leather-effect fabric with rubber sole. JULIAN SUSTAINABLE: The upper is made with the most eco-friendly polyurethane alternative to animal skin obtained from grapes waste. The sole was created using pre-consumer recycled TPU, while the solvent-free tag. Material: 44% POLYESTER 40% POLYURETHANE 8% POLYAMIDE 8% POLYURETHANE.