Upper microfiber/textile combination lining. Breathable lining. Insole is comfortable, cushioning, moisture-wicking, and antibacterial. A separate heel cup provides good cushioning and foot guidance with "Airflow" channels. Outsole is made of rubber, resistant to oil, gasoline, heat, and cold, non-marking, and self-cleaning. Anti-slip features provide very good grip on different terrains, even in cold conditions, due to the tread design and special rubber used. Durable sole made from a rubber compound for long life. Midsole is an elastic two-layer PU, lightweight, and cushioning, with a stabilization zone for optimal pressure distribution on uneven terrain. The HAIX® Climate System uses the pumping motion created when walking to transport moisture to the ventilation openings on the upper and tongue. Dynaframe HX design.