Base Layers

Simms' Lightweight Baselayer Top is the essential next-to-skin layer for building a rock-solid foundation that prioritizes all-day mobility, warmth...

With its innovative, seamless, 3-D knit structure, our Capilene® Air Bottoms offer amazing warmth and comfort range. An airy blend of 51% responsib...

Simms' Lightweight Baselayer Bottom is the essential next-to-skin layer for building a rock-solid foundation that prioritizes all-day mobility, war...