Stone Glacier Grumman Down Vest

The Grumman Vest delivers serious core warmth in a streamlined layer that disappears into your pack until you need it. Ultralight and ultra-packable, it’s built to wear over base and mid layers and under a shell in cool-to-cold conditions, helping you stay warm without giving up the freedom to draw, hike, glass, or move comfortably through the day.

Sharing the same technical build as the Grumman Jacket in a smaller package, this vest combines a 15 denier Pertex® Quantum shell with 850+ fill treated goose down for an impressive warmth-to-weight ratio. The HyperDRY™ DWR-treated down helps maintain performance in demanding weather, while the sleeveless design keeps your core insulated without restricting upper body mobility. Use it as an active insulation piece on crisp mornings, or layer it with the Grumman Jacket when temperatures drop hard and you need even more warmth in the field.

Features

• Ultralight, ultra-packable down insulation for cool-to-cold conditions
• Designed to be worn over base and mid layers and underneath a shell
• Helps keep your core warm without limiting upper body mobility
• Shares the same technical specs as the Grumman Jacket in a smaller, lighter package
• 850+ fill power treated goose down offers exceptional warmth with minimal bulk
• HyperDRY™ DWR-treated down helps maintain dependable insulation performance
• Works well as an active insulation layer for hiking, glassing, and everyday cold-weather use
• Pairs easily with the Grumman Jacket for added warmth in very cold conditions
• 100% traceable RDS certified down
• Streamline internal cuff helps seal in warmth
• Elastic waist hem improves fit and helps block cold air
• YKK zippers for reliable durability
• Stuff sack included for compact storage in your pack
• Pairs well with the Grumman Goose Down Pants for a complete cold-weather insulation system

Specifications

• Product: Grumman Vest
• Shell Fabric: 15 Denier Pertex® Quantum
• Insulation: 850+ fill power HyperDRY™ DWR-treated goose down
• Down Certification: 100% traceable RDS certified down
• Insulation Weight: 3.05 oz.
• Total Weight: 7.2 oz. (Size Large)
• Packed Size: 8" x 4" x 3.5"
• Included: Stuff sack

Add the Grumman Vest to your layering system for lightweight core warmth, premium packability, and the freedom to stay mobile when cold weather moves in.

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