Mens Layering & Underwear

Our warmest midlayer for cold days, the M's Thermal 1/4 Zip Top adds warmth on its own, or layer it under your favorite jacket to dial in reliable ...

Our warmest midlayer for cold days, the M's Thermal Pants feature a grid-fleece interior that traps heat next to skin, without adding bulk or limit...

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

Featuring an asymmetrical zipper for complete and more comfortable protection of your nose and mouth, our Heavyweight Hoody is designed to be worn ...

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

When days get shorter, stay in the game longer with our Heavyweight Baselayer Bottoms powered by stretch micro-grid fleece for optimum mobility, wa...

Leaves will fall, ice will form, and you'll stay fishing thanks to these toasty fleece bib insulators.Short days and icy waters are part of the win...

Keep your goods dry and fresh with Simms' Cooling Boxer Brief. Heat conquering Avra™ yarn comes together with exceptional stretch to provide all da...

Simms Boxer Brief Moisture-wicking all-day comfort. Built from micro-stretch materials to wick moisture and battle odor. Designed to...

From flashlight wake-up calls to sunset campfires, the Simms Boxer Brief provides all day wicking comfort and a nonrestrictive, supportive fit. C...

Kick the snot out of the cold, wet and unforgiving with the ultimate waterproof, insulated bib. Rugged GORE-TEX fabrics and PrimaLoft® insulation d...

Fit Slim fit Workbook Overview The R1® Air Crew is a lightweight, breathable and quick-drying technical fleece for high-exertion activities i...

The ultimate layer for hardworking feet, pull on the Bulkley Bootie before slipping into your waders for added comfort and warmth in the coldest co...

A classic, all-around 100% recycled polyester baselayer. The smooth, soft face makes for easy layering. Hollow-core yarns and a diamond-grid back t...

A classic, all-around 100% recycled polyester baselayer. The smooth, soft face makes for easy layering. Hollow-core yarns and a diamond-grid back t...

A breathable, lofted baselayer to keep you warm in cold conditions. Polartec® Power Grid® fabric with HeiQ® Pure odor control. Made in a Fair Trade...

A breathable, lofted hoody that keeps you warm in cold conditions and is styled to layer over your favorite tech tee. Made of Polartec® Power Grid®...