Lightweight, responsibly-sourced and traceable goose down insulation makes the Filson Down Cruiser extremely warm without being heavy—with water-resistant oil finish Cover Cloth shell fabric covering lofty, heat-trapping down. Oil finish Shelter Cloth is used for the pockets and lower back reinforcement for increased durability and water resistance. The handwarmer pockets and collar are lined with 100% virgin wool for added warmth, and the front zipper is protected by a snap-securing storm flap to keep wind and water out. Snap-flap covered cargo and chest pockets keep gear secured. The left chest utility pocket is slotted to hold small tools.