Marmot WarmCube Men's Winter Jacket Insulated Coat

Engineered for high-output cold-weather adventures, the Marmot WarmCube™ Active Alt HB Jacket is a next-generation insulated layer built for dynamic conditions. Its 3D WarmCube® construction keeps the 700-fill down in place, creating thermal channels that trap heat when you're still and release excess warmth when you're in motion—helping you stay dry and regulated in fluctuating climates.

This performance-driven coat is Marmot’s lightest high-performance down jacket to date, featuring Down Defender-treated insulation for added protection in damp conditions. Whether you're powering up a snowy ridge or taking a breather at the summit, this jacket adapts to your pace.

Key design features include:

• Gusseted underarms for unrestricted movement
  
• A fixed hood and elastic-bound cuffs for snug coverage
  
• Zippered chest and hand pockets to secure essentials
  
  

From backcountry ski tours to alpine scrambles, this versatile piece delivers warmth when you need it—without overheating when you don’t. Wear it as a midlayer under your shell or on its own during dry, cold days.