Arc'teryx Rho Heavyweight Base Layer Bottom Women'sThe Arc'teryx Rho Heavyweight Base Layer Bottom for Women is the brand's warmest base layer pant, made for cold days and mixed output. On the move, the Polartec Power Stretch Pro stretches for outstanding freedom of movement. During rest phases or when it gets really cold the fleece's soft brushed interior traps heat to keep you warm. The fleece's durable nylon outer has a smooth face for comfort under layers, and a zippered thigh pocket secures small