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HyperDown 15 Sleeping Bag: 900-Fill Warmth for Sub-Zero Backcountry Camps

Deep Winter Warmth That Holds When Temperatures Drop

900-Fill Allied Down — Warmth-to-weight that packs small
ExpeDRY Treatment — Wet-weather performance from goose down
Glass Without Leaving — Zippered arm holes free your hands
2lb 3oz Packed — Ultralight for deep backcountry camps
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Original price was: $880.00.Current price is: $616.00.

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In the box

  • HyperDown 15 Sleeping Bag — Deep Lichen
HyperDown 15 Sleeping Bag
HyperDown 15 Sleeping Bag: 900-Fill Warmth for Sub-Zero Backcountry Camps
$880.00 Original price was: $880.00.$616.00Current price is: $616.00.

Deep Winter Warmth That Holds When Temperatures Drop

The HyperDown 15 is a full-body bunker built for the coldest nights in the backcountry. Allied Down 900-fill goose down delivers serious warmth-to-weight performance, while the gold-infused ExpeDRY treatment keeps insulation working even when conditions turn wet. This wilderness-grade bag is constructed to layer over your full clothing system when the mercury plummets. Zippered arm holes free your hands for glassing or cooking without leaving the bag. Field-tested and season-proven for late-season hunts where staying warm isn't optional — it's survival.

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900-Fill Goose Down
15°F Comfort Rating
ExpeDRY Wet-Weather Treatment
Zippered Arm Holes
15°F
Comfort Rating
2lb 3oz
Weight (Size Reg)
900-Fill
Allied Goose Down
Warmth That Holds When The Mercury Drops

Warmth That Holds When The Mercury Drops

The sleeping bag that felt warm in a store demo is not the same bag that keeps you alive at 10,000 feet when the temperature drops to single digits on day eight of a backcountry elk hunt. The HyperDown 15 earns its spot because we have field-tested it against exactly that scenario. Allied Down 900-fill with gold-infused ExpeDRY treatment means this goose down resists moisture like a synthetic but packs lighter. At 2lb 3oz, it disappears in your pack. At camp, the 15°F rating with room for layered clothing means you are not gambling on whether your bag matches the forecast. We do not stock gear we would not bet a tag on.

Glass From Inside The Bag At First Light

Glass From Inside The Bag At First Light

The 15 minutes before legal shooting light are when bulls move through timber openings. The HyperDown 15 has zippered arm holes and a ⅘-length center zip that let you run your binos or cook breakfast without leaving the warmth of your bag. The adjustable contoured hood, borrowed from the HyperDown Jacket design, seals around your face while keeping your field of view clear for glassing. A 10D ripstop nylon shell handles abrasion when you are sliding in and out of a floorless tent on abrasive rock and grit. This is not a sleeping bag designed for car camping. It is built for hunters who spend first light behind glass, not in a sleeping bag that forces them out.

Two Pounds Three Ounces That Disappears In Your Pack

Two Pounds Three Ounces That Disappears In Your Pack

At 2lb 3oz in the Regular size, the HyperDown 15 compresses small enough to ride inside a pack alongside your optics, kill kit, and three days of food without turning your load into a burden. The 900-fill Allied Down is the reason — higher fill power means more loft per ounce, which means less bulk for the same warmth. The Regular fits up to 6ft, the Long up to 6ft 6in. The 15°F rating is built to accommodate your layered clothing system, so when the mercury drops below what the forecast predicted on a late November mule deer hunt, you have thermal margin built in. This is season-proven, wilderness-grade sleep gear.

Size Compatibility

Available in Regular and Long. Choose based on your height and layering needs for late-season hunts.

  • Height up to 6ft / 72in (Regular size)
  • Built to accommodate additional clothing layers
  • 4/5 length center zip enables standing wear

Built For These Hunts

The HyperDown 15 is designed for the coldest, most demanding backcountry scenarios serious hunters face.

Late-Season Elk Backcountry
High-Altitude Sheep Camps
November Whitetail Cold Fronts

Full specifications

At a glance

Dimensions
2lb 3oz / 971g
Warranty
See product page
Full specifications8 data points across 4 categories

Dimensions

Weight (Size Reg)2lb 3oz / 971g
Size Reg FitUp to 6ft or 72in

Power & Performance

Comfort Rating15°F
InsulationAllied Down 900-fill goose down
Down TreatmentGold-infused ExpeDRY

Materials

Shell & Lining10D ripstop nylon
Zipper4/5 length center zip

Compliance & Warranty

WarrantySee product page

The Hunt Premium Promise

Every product we carry earns its spot through honest evaluation. Here's what you get when you buy from Hunt Premium.

Authorized DealerFull manufacturer warranty honored on every product. No gray market, no risk.
Free ShippingShips free. Fully insured with signature confirmation.
Pay as Low as $52/monthSplit your $616 purchase into manageable payments with Affirm or Klarna.
★★★★★
“Eight days in November in the Selway. Nighttime lows hit single digits and the tent walls frosted over solid. I slept in a base layer and puffy inside the HyperDown 15 and was genuinely warm — not surviving, actually warm. The arm holes let me glass the drainage at first light without crawling out into the cold. At 2lb 3oz it barely registered in my pack. This is the first sleeping bag I have owned that I did not dread getting into at the end of a long day.”
F
First L.Missoula, MT

A full-body bunker in the depths of winter, the Hyperdown 15 Sleeping Bag is the warmest sleeping bag Sitka have ever made. Best-in-class Allied Down 900-fill goose down sets the standard for warmth-to-weight and packability, while the ExpeDRY treatment provides synthetic-like performance in wet weather. The 15° bag is constructed to accommodate additional layers in your clothing system when the mercury plummets. Thoughtfully placed zippers free your arms to enable glassing or cooking and maximize time spent in warmth that you won’t want to leave behind.

FEATURES:

  • 15°F comfort rating
  • Allied Down 900-fill for category leading warmth-to-weight ratio and packability
  • Gold-infused ExpeDRY goose down boosts evaporation and offers synthetic-like performance in wet weather
  • Zippered arm holes allow for free hands without leaving the warmth of the bag
    ⅘ length center zip provides the option to be worn standing up, or as added insulation while glassing
  • Adjustable contoured hood shares design with Hyperdown Jacket
  • 10D ripstop nylon shell and lining resist abrasion outside of the tent
  • 2lb 3oz / 971g, Size Reg
  • Size Reg fits up to 6ft or 72in
  • Size Long fits up to 6ft 6in or 78in
  • MPN: 600401           

Additional information

Color

Deep Lichen
Size

Long, Regular

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Frequently Asked Questions

The difference is 900-fill Allied Down versus 650-fill or 750-fill alternatives. Higher fill power means more loft per ounce — more warmth with less weight and less packed bulk. At 2lb 3oz, the HyperDown 15 packs significantly smaller than lower-fill bags at the same temperature rating. The ExpeDRY treatment adds wet-weather performance that standard goose down cannot match. For a hunter who spends 15-plus days a year in the backcountry, this is a 10-year purchase. The cost-per-night difference disappears after two seasons of hard use.
Every product Hunt Premium sells ships with full manufacturer warranty backing. We are an authorized dealer, which means your warranty is honored directly through the manufacturer — no gray-market risk, no voided coverage. If you ever need to file a claim, we handle the process on your behalf. Buying from unauthorized third-party sellers means you may discover the warranty is void when the product actually fails. At $616, that is not a position you want to be in.
The 15°F comfort rating is designed to accommodate your layered clothing system inside the bag. At 9,000 feet in November, nighttime lows regularly drop into the single digits or below. With a base layer and mid-layer inside the HyperDown 15, you have thermal margin built in rather than hoping the bag rating matches the actual temperature. The 900-fill Allied Down and contoured hood seal around your face to eliminate drafts. This bag is built for exactly the scenario you described.
Gold-infused ExpeDRY treatment coats each individual down cluster to boost evaporation speed and resist moisture absorption. It will not make this bag waterproof — no down bag is — but it dramatically reduces the performance loss that normally occurs when goose down gets damp from condensation inside a tent or from rain during a pack-in. In field testing, ExpeDRY-treated down retains significantly more loft than untreated down after repeated moisture exposure. The 10D ripstop nylon shell adds another layer of moisture resistance on the exterior.
The Regular fits up to 6ft or 72 inches. The Long fits up to 6ft 6in or 78 inches. If you are at or near the cutoff, go Long — extra space at the foot also gives you more room to store gear or keep boot liners warm inside the bag overnight. Both sizes weigh the same at the packed spec, so there is no weight penalty for the longer cut. If you are 5ft 10in or shorter, the Regular will give you a warmer fit with less dead air space to heat.
September nights in elk country can drop into the 30s, especially at elevation. The HyperDown 15 will be warm, but the zippered arm holes and ⅘-length center zip give you venting options that a lighter bag does not offer in reverse. You can unzip and stick your arms out to regulate temperature without fully opening the bag. If you hunt both early and late seasons, this single bag covers your entire calendar rather than owning two bags that each see limited use.
SKU: 20-600401-DLI-RGL Categories: , Brand:

The Hunt Premium Promise

Every product we carry earns its spot through honest evaluation. Here's what you get when you buy from Hunt Premium.

Authorized Dealer Full manufacturer warranty honored on every product. No gray market, no risk.
Free Shipping Ships free. Fully insured with signature confirmation.
Pay as Low as $52/month Split your $616 purchase into manageable payments with Affirm or Klarna.

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