The Rab Cirrus Ultra Hoody is a men's jacket that looks, feels, and packs like a down insulator even though it's entirely synthetic. As such, its lofty warmth is more resilient in damper environments, and it's simply more reliable on multi-day mountain adventures. There are panels of Primaloft Gold for greater resilience in key areas, and the core is lined in TILT to bounce body heat back your way for additional warmth. The jacket also blocks brisk breezes and sheds light moisture with a durably windproof, water-resistant Pertex Quantum Pro shell. A regular fit lets you layer up or down for versatile wear all year long. Like all Rab products this season, the Cirrus Ultra Hoody features a PFAS-free construction.