Premium down alternative. Cotton sateen cover. 300 thread count. Easy-care machine wash. You'll love the feel and warmth of our Primaloft Blankets. Antimicrobial, hypoallergenic, and machine washable, Primaloft is the premier down-alternative fill that is a proprietary mix of short length fibers with a structure and softness similar to down. Lofty 600 fill power with baffle box construction maximizes fluffiness while maintaining the blankets form. . . . . Imported.