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