PrimaLoft™ - Originally developed for the military, Primaloft’s extremely lightweight core structure suspends millions of air particles in a microfiber mesh. These microscopic air particles repel water while trapping heat to keep you warm in the nastiest conditions, even after repeated washings. Primaloft is compressible, breathable and offers superior water repellency so you remain dry, warm and comfortable even under the most extreme conditions.
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