The evolution of leading ice and mixed climbing boot continues with the Phantom Tech. The latest version improves fit, protection and warmth while reducing it's eco-impact. Primaloft? Gold and Ortholite? O-Therm up the warmth factor, while a RECCO? reflector increases searchability. The final product maximizes your ability to accomplish your high-end, high-output ice and mixed climbing objectives, allowing you to move quickly and efficiently over technical terrain.  PU Tek Technology & S-Tech Schoeller Ecorepel Bio fabric backed by HDry Lamination to keep you warm and dry Microfiber face with Primaloft Gold Insulation Technical Features Double Boot: Yes Crampon Compatibility: Automatic, semi-automatic Last: Arc Rand: Full Weight 800g (pair size 42) Materials Midsole: 2D PU Outsole: Vibram Precision Tech Roll / Durastep Lining: Micropile + PrimaLoft Insole: Carbon Fiber + EVA + Aerogel