The Rab Women's Cirrus Ultra Hoody might look and feel like a down insulator, but since it's synthetic, it stays warm in the alpine when it's damp out. It features Primaloft's newest Thermoplume insulation that mimics down while staying resilient when wet. A Pertex Quantum Pro shell provides durable windproof protection and water-resistant weather protection. Rab also added Primaloft Gold insulation at the sides, sleeves, and shoulders for even greater compression and moisture management in key areas. The jacket also has a TILT lining that reflects body heat back your way for even more warmth.