The Haix Airpower XR91 is the further development of its prominent predecessor, the R91. The shoe is designed for rescue services, has the quick lacing system familiar from firefighting boots and is equipped with the bacteria and chemical-resistant Crosstech membrane. The upper material is made of waterproof and breathable full-grain leather, which is very hard-wearing and yet very supple. The integrated Gore membrane is not only permanently waterproof and breathable, it also offers excellent protection against bacteria and chemicals. The protective toe cap is made of plastic and offers plenty of space inside. It is additionally protected on the outside with a toe cap made of robust TPU. Penetration protection is provided by a metal midsole.