Water-repellent laced winter boots with removable insulating felt liner. Comfort zone : -45°C/-50°F. Details: Waterproof synthetic leather and hydrophobic ripstop nylon. H2O Seal® process sealed seams at vamp area. Laced up boot with barrel lock closure system to make them easier to put on. High visibility reflective inserts. Extra boot lace included. Waterproof, extremely lightweight, flexible and insulating EVA shell. Adherent and stable synthetic rubber outsole. Removable triple density insulation liner with stabilizer arch. Removable insulating felt insole trapping moisture.