Stone Glacier Grumman Down Jacket

Ultralight Down Jacket for Backcountry Hunting

The Stone Glacier Grumman Down Jacket is built for backcountry hunters who need serious warmth, protection, and packability in an ultralight package. Designed to disappear in your pack until conditions demand insulation, this jacket delivers exceptional warmth-to-weight performance for glassing, late-season hunts, and cold mountain conditions.

850+ Fill Power Down with Pertex® Quantum Protection

Insulated with HyperDRY® 850+ fill power DWR-treated goose down, the Grumman provides high-loft warmth while helping retain performance in damp conditions. The 15 denier Pertex® Quantum shell uses a tightly woven structure to remain light, soft, quiet, windproof, and highly packable while allowing the down insulation to fully loft.

Packable, Quiet, and Built for the Field

This updated version features a refined dull-yarn micro-ripstop face fabric for improved durability and a quieter matte finish. Increased pocket depth, subtle fit adjustments, an articulated hood, streamlined internal cuffs, reverse-coil YKK® zippers, and an internal pocket that doubles as a stuff sack make the Grumman a proven insulation piece for demanding hunts.

Key Features:

• Ultralight down hunting jacket for backcountry use

• Built for warmth, packability, and protection

• 15 denier Pertex® Quantum shell

• Pertex® Quantum fabric is light, soft, quiet, windproof, and packable

• Refined dull-yarn micro-ripstop face fabric

• Improved durability with a quieter matte field finish

• 850+ fill power goose down

• 5.3 oz. of insulation

• 90% down clusters / 10% small feathers

• HyperDRY® DWR-treated down

• HyperDRY™ water-resistant down uses a fluorocarbon-free treatment

• Designed to help down retain warmth-to-weight performance when wet

• 100% traceable RDS-certified down

• Responsible Down Standard certified supplier

• Articulated hood for warmth and coverage

• Streamlined internal cuff design

• Elastic waist hem

• YKK® zippers

• Increased pocket depth for comfort and usability

• Internal pocket doubles as a stuff sack

• Super DWR finish maintains water-repellent performance through extended use

• Weight: 13.6 oz. in size Large

Style No. 80006

Summary

The Stone Glacier Grumman Down Jacket is an ultralight insulation layer built for backcountry hunters who need premium warmth without bulk. With HyperDRY® 850+ fill power goose down, a 15 denier Pertex® Quantum shell, traceable RDS-certified down, a quiet micro-ripstop face fabric, articulated hood, YKK® zippers, and packable stuff-sack storage, it delivers dependable warmth and protection for cold mountain hunts.