Olang Isowarm Inner Soles Increase the comfort & insulation offered by your snow boots by adding an Olang Isowarm Inner Sole thermo footbed. The Isowarm Inner Sole keeps your feet warm & dry by isolating the footbed from the cold whilst maintaining an even temperature. Achieve a comfort zone down to temperatures as low as minus 30 degrees with an aluminium backed PU innersole. Thermo formed inner sole Aluminium backed for insulation Soft fleece for even comfort Comfort zone -30 degrees Celcius Sizes available EU 36-47 for perfect fit