Temperature: -50°F / -45°C Features: Upper -Waterproof synthetic leather and hydrophobic ripstop nylon -H2O Seal process sealed seams at vamp area -Two hook and loop or laced up boot with barrel lock closure system -High visibility reflective inserts -Extra boot lace included. Insulated -Removable triple density insulation liner with stabilizer arch (sizes 13 to 8) -Removable insulating felt insole trapping moisture Shell -Waterproof, extremely lightweight, flexible and insulating EVA shell -Adherent and stable synthetic rubber outsole