Technical detailsComfort zone down to -35CRetractable crampon combined with a non-slip sole100% premium leather100% waterproof membrane200g Thinsulate insulationLining: 50% Merino wool / 50% polyesterRemovable laminated polyurethane weatherproof insoleRemovable aluminium/felt insoleReal rubber soleCrampon made of stainless steelPossible replacement cramponNew concept of patented cleated sole