Your next to skin layer.  In cold conditions the purpose is two-fold, to draw moisture away from the body to keep you dry while also providing insulative value to ward off hypothermia.

The purpose of the mid layer is to be worn over base layers but they’re also versatile enough to be worn by themselves and are intended to serve as another layer of heavier thermal protection.

Functionality, durability, packability, and versatility.  The level 3 layer provides you with all the options to tackle any climate.  This is your first line of defense from the elements.

Worn over any combination of levels 1-3, these Shells defy the elements, providing protection from heavy wind, rain, and snow.