One of the most active, versatile jackets available, the United by Blue Bison Sport Jacket is ready to keep you warm while you're out enjoying everything winter has to offer. This American-made jacket is insulated with a specialized blend of bison fiber and recycled polyester that's naturally wicking, temperature regulating, and antimicrobials. Sustainably sourced, the filling is made from the underused and often-discarded bison's hollow outer guard hairs. This jacket is perfect for the slopes, the commute, hikes, and anywhere that temperatures dip between 0-40 degrees.