Is the Chilkat 400 II warm enough for extreme cold?

Yes. It has 400 g PrimaLoft Silver Eco insulation, the warmest tier in The North Face's winter line, and is meant for sustained sub-freezing conditions. It can feel too warm in mild weather.

Is it fully waterproof?

The full-grain leather upper is waterproof and the seams are sealed, so slush and wet snow stay out. Keep the leather conditioned, since dried-out leather loses its water resistance.

How does it compare with the Chilkat III?

The 400 II carries heavier insulation and IcePick lugs for colder, icier conditions. The Chilkat III is lighter and less insulated, better for milder winters and more walking.

Does it run true to size?

Most owners say it fits true to size, but the stiff leather and thick insulation leave little room for thick socks. Try your normal size first and size up only if you wear very heavy socks.

Can I attach gaiters?

Yes. A D-ring at the front of the shaft anchors gaiters for deep snow, and the 7.75-inch shaft already covers the ankle.

What is the boot made of?

A waterproof full-grain leather upper over an EVA midsole and TNF Winter Grip rubber outsole with IcePick lugs. It is a lace-up utility boot, not a rubber pac boot.