We use PrimaLoft® insulation inside insulated garments for its warmth, compressibility and soft comfort. While the human body uses energy to stay warm, PrimaLoft insulation uses a proprietary microfiber structure to help the body retain warmth and conserve energy.

PrimaLoft insulation uses fibers just a fraction the diameter of a human hair to form a tight collection of air pockets that trap heat from your body and keep the cold out, providing an excellent warmth-to-weight ratio. When insulation gets wet, it can lose these air pockets and, consequently, its insulating properties. PrimaLoft ultra-fine fibers were developed to be water resistant so your insulation stays drier and maintains its insulating properties. The ultra-fine fibers create a tight surface tension that won’t allow water to pass through. Unique, permanent fiber finishes repel water and keep the insulation drier, even if water is forced into the insulation.

Fiber diameter directly influences softness. For example, if you compare canvas fabric to silk fabric you’ll see that the finer silk fibers result in a softer material. So PrimaLoft fibers have been engineered to be ultrafine and mimic the softness of down. Thus, these ultrafine fibers mimic the compressibility of goose down and are breathable, allowing moisture vapor to be transported through the fibers and away from the skin.

PrimaLoft® Gold Insulation Eco

PrimaLoft® Gold Insulation Eco was born out of the challenge to do better for the environment. Modeled after PrimaLoft’s highest-performing synthetic insulation, Gold Eco provides excellent warmth for its weight and maintains 98% thermal efficiency when wet, all while using 55% post-consumer recycled fibers. In 2016, we updated all our products that used PrimaLoft Gold insulation to Gold Insulation Eco.

PrimaLoft® Silver Insulation Hi-Loft

This insulation is uniquely built with two different sizes of fibers, one for high thermal values and packability, the other for increased loft. It offers these advantages in a comfortable yet durable package. This insulation considers the fundamentals–delivering 85% retention of insulation value, and offering excellent thermal efficiency when dry.