Marmot Cold Technology

PrimaLoft® ONE

PrimaLoft® ONE insulation technology is the highest performing insulation on the market for warmth, water resistance, softness and compressibility.

What is it?

PrimaLoft® One is the ultimate microfiber insulation. Ultra fine fibers are specially treated in a patented process and then combined into an insulating core that is incredibly soft, lightweight and water resistant.

How does it work?

The human body is 98.6 degrees Fahrenheit but often ends up in places that threaten to make it far colder than that! PrimaLoft insulates your body to keep it comfortable and conserve energy even in extreme cold.

Ultra-fine fibers form tiny air pockets that trap body heat and keep the cold out. The result is immediate warmth without the bulk. PrimaLoft® ONE Microfibers are engineered for permanent water resistance and create tight surface tension that resists moisture penetration, resulting in an insulation that dries faster than goose down. Ultra-fine fibers mimic the compressibility of goose down and are breathable, allowing moisture vapor to be transported through the fibers and away from the skin.

What are the benefits of this technology?

PrimaLoft One absorbs 3 times less water, is 14% warmer when dry and is 24% warmer when wet than the competitive insulation. It dries faster than down, but is just as warm, soft and compressible. It's lightweight, breathable and wind resistant.