The Sitka HyperDown Pant is engineered for serious big-game hunters who refuse to let brutal winter weather dictate their hunt. Designed as Sitka’s warmest insulated hunting pant, the HyperDown Pant features 800-fill power PrimaLoft® Gold down blend with Cross Core™ technology, delivering unmatched warmth in sub-zero conditions. Built to layer over your existing system, these extreme cold hunting puffer pants provide expedition-level insulation without sacrificing mobility. Whether you’re glassing for elk on wind-blasted ridges, enduring late-season whitetail sits, or navigating frozen backcountry terrain, the HyperDown Pant locks in warmth and blocks the deep freeze. If you demand elite late season hunting insulation, this is the pant built for the mission. Key Features of the Sitka HyperDown Pant 800 Fill Power PrimaLoft® Gold Down Blend with Cross Core™ TechnologyUltra-efficient insulation delivering maximum warmth-to-weight ratio. 90% Down / 10% Synthetic BlendCombines compressibility with warm-when-wet performance. 27D Ripstop Polyester Face FabricLightweight yet durable outer shell resists snags and abrasion. 10D Ripstop Nylon LiningSmooth interior for easy layering. Double-Layer Reinforcement on Seat & KneesAdded durability in high-contact zones. ⅞-Length Side ZipsAllows quick on/off even over boots. Strategic Leg Zipper LayoutEasy access underneath other layers. Elastic Waist with Zippered FlySecure and adjustable fit. Suspender CompatibleBuilt for backcountry support systems. Designed to Wear Over Existing LayersIdeal for stationary glassing or extreme cold sits. Specifications Insulation – 800-Fill PrimaLoft® Gold Down Blend (90% Down / 10% Synthetic)Shell – 27D Ripstop PolyesterLining – 10D Ripstop NylonLayer Type – Overlayer / Extreme Cold InsulationBest Use – Late season elk hunting, mountain hunts, extreme cold whitetail hunts Dimensions (Size L Regular Approximate) Garment Weight – Approx. 24–28 ozInseam – 32 inches (Regular)Outseam – Approx. 43–44 inchesWaist – Elastic adjustable fit (34–38 inch range)Fit Profile – Designed to layer over base and mid-layers (Available in multiple waist sizes and lengths.) Why Hunters Choose the Sitka HyperDown Pant • Sitka’s warmest down insulated hunting pant• Built for extreme cold and late season hunts• Easy on/off with full side zips• Reinforced durability for rugged terrain• Premium insulation with Cross Core™ aerogel technology