HyperDown Jacket by Sitka

The Sitka HyperDown Jacket is Sitka’s pinnacle cold-weather insulation piece, built for hunters who face harsh, unforgiving conditions in late-season or high-altitude environments. Engineered with cutting-edge insulation technology, this jacket delivers maximum thermal efficiency with minimal weight and bulk. Its blend of premium down and synthetic insulation ensures reliable warmth even in damp or fluctuating conditions, while its rugged design and packable construction make it essential gear for remote backcountry hunts.

With a fit designed to layer over base and mid layers, the HyperDown Jacket provides unrestricted mobility, quiet movement, and advanced thermal performance when it matters most. Whether glassing ridgelines or sitting through long, frozen sits, this jacket keeps you warm, protected, and fully focused.

Key Features & Benefits

• 800-Fill PrimaLoft® Gold Down Blend with Cross Core™ Technology
  Combines the unmatched warmth-to-weight ratio of down with synthetic resilience, ensuring insulation performs even when compressed or exposed to moisture.

• Hybrid Insulation Performance
  Approximately 90% down and 10% synthetic content stabilizes loft and maintains consistent warmth, even in cold, damp conditions.

• Durable Ripstop Shell and Liner
  The 27D ripstop polyester shell resists abrasions in rugged environments, while the 10D ripstop nylon lining offers soft, lightweight comfort.

• Layer-Over Fit Design
  Built to be worn over other layers, including harnesses, making it fast and easy to adjust for changing weather and activity levels.

• Secure Storage
  Features two zippered hand pockets for warming or stashing essentials, plus two large internal mesh dump pockets ideal for gloves or accessories.

• Adjustable Hood and Hem, Elastic Cuffs
  Seal in warmth and customize your fit with low-profile adjustability that enhances coverage without adding bulk.

• Lightweight and Packable
  Despite its heavyweight warmth, the jacket compresses easily for space-saving storage in your pack when not in use.

• Quiet, Stealth-Ready Fabric
  Engineered for minimal noise, allowing you to move freely and silently in high-stakes hunting scenarios.

Specifications

• Insulation: 800-fill PrimaLoft® Gold down blend with Cross Core™ Technology

• Down Content Ratio: ~90% down / 10% synthetic

• Shell Fabric: 27D ripstop polyester

• Lining Fabric: 10D ripstop nylon

• Pockets: 2 zippered hand pockets, 2 internal mesh dump pockets

• Adjustability: Adjustable hood and hem, elastic-bound cuffs

• Fit: Designed to layer over base and mid layers

• Weight: Lightweight and compressible

• Use Case: Late-season, cold-weather, alpine or stationary hunts

• Care Instructions: Machine wash gentle, tumble dry low with clean tennis balls to restore loft. Avoid fabric softeners.

• Warranty: Covered under Sitka’s limited manufacturer warranty against defects in materials and craftsmanship