BREATHTEX waterproof membrane Comfort zone up to -30°C European fabrication with sizes raging from 36 - 42 Italian design and manufacture by a specialized adult workforce. Italian sole with built-in swiveling and folding Oc System® with flow channel. Lining is enhanced with breathable insulating OLANTEX film. Multilayer adjustment innersole made of 90% wool with insulating and reflective aluminium film. Robust zipper with a bellow stopping the intrusion of snow. Sole with 16 stainless steel spikes.