Modern BOSS Parkour Runn trainers with hybrid uppers in nylon, mesh and leather. The runner style sits on a lightweight sole and is fastened with a hiking-inspired lacing system. Lined with a charcoal-bamboo fabric to wick moisture, they’re finished with a memory foam insole for cushioned comfort.Upper: Polyester/Polyurethane/Leather. Lining: Cotton/Viscose. Sole: EVA/Rubber/Thermoplastic Polyurethane.