Stone Glacier Grumman Down Jacket

When warmth matters but pack space is limited, the Grumman Goose Down Jacket delivers serious insulation in an ultralight, highly packable design. Built for backcountry use, this technical down jacket works as a warm outer layer during low-output time in cold conditions or as an insulating layer under a shell when the weather turns especially cold and wet.

Designed to balance warmth, weight, and compressibility, the Grumman uses a 15-denier Pertex® Quantum shell paired with HyperDRY™ 850+ fill power DWR-treated down for dependable performance in demanding conditions. The 100% traceable RDS-certified 90/10 goose down fill offers impressive loft without unnecessary bulk, while the articulated hood, streamline internal cuff design, and elastic waist hem help seal in warmth when temperatures drop. With strategic color blocking, durable YKK zippers, and a stuff sack included for compact storage, this is a go-to insulation piece for cold-weather layering on mountain hunts, backpack trips, and late-season days outdoors.

Features

• Ultralight and packable down insulation built for cold-weather backcountry use
• Can be worn as an outer layer during static activity in cold conditions or layered under a shell in extremely cold, wet weather
• 15D Pertex® Quantum shell helps keep weight low while maintaining durability
• HyperDRY™ 850+ fill power DWR-treated down delivers high-loft warmth with excellent packability
• 5.3 oz. of 90/10 goose down fill provides substantial insulation for its weight
• 100% traceable RDS-certified down for responsibly sourced insulation
• Articulated hood improves coverage and comfort in harsh conditions
• Streamline internal cuff design helps trap warmth and layer cleanly
• Elastic waist hem helps seal out cold air
• YKK zippers offer reliable performance in the field
• Strategic color blocking adds a technical, mountain-ready look
• Stuff sack included for easy packing and storage
• Pairs well with the Grumman Goose Down Pants for a complete cold-weather insulation system

Specifications

• Product: Grumman Goose Down Jacket
• Shell Fabric: 15 Denier Pertex® Quantum
• Insulation: HyperDRY™ 850+ fill power DWR-treated goose down
• Down Fill: 5.3 oz. of 90/10 goose down
• Certification: 100% traceable RDS certified down
• Weight: 11.8 oz. (Size Large)
• Packed Size: 8" x 4" x 3.5"
• Included: Stuff sack

Add the Grumman Goose Down Jacket to your layering system for premium warmth, minimal bulk, and packable performance when cold-weather conditions demand more from your gear.

Notice: This product is intended for severe wet conditions. DWR made with PFAS chemicals.