ROCK FRONT 1000 3D Ultralight down sleeping bag
615.85$
Warmest bag in the ROCK FRONT lineup. Built for winter backpacking, mountaineering, and cold bivy nights.
Sleeping Bags
Choose your sleeping bag size
Take measurements and select the required settings to determine the size of your sleeping bag correctly.
Select your measurements
- A - body height from the top of the head to the heels, measure without shoes.
- B - measure horizontally with your hands at the level of your chest.
- C - measure horizontally at the most protruding part of the hips.
* Data are measured in centimeters
You can also use the chart below:
| Width (circumference) / Height | Shoulder: up to 110 cm / Hip: up to 100 cm | Shoulder: 111-130 cm / Hip: up to 120 cm | Shoulder: 131-150 cm / Hip: up to 140 cm |
|---|---|---|---|
| up to 164 cm | S Medium | M Short | |
| 165-176 cm | M Medium | L Short | |
| 177-188 cm | M Long | L Medium | |
| 189-197 cm | L Long |
- If your height is on the borderline of sizes (for example 176 cm), you can choose M Medium or L Short. If your height is 177 cm and above, choose between M Long and L Medium.
- If your width parameters are close to the limit (1-4 cm) and you need additional internal space, choose a wider size.
Maximum warmth, stripped to essentials
Expedition-level down sleeping bag in 10D nylon micro ripstop with shortened YKK #5 coil zipper for lower heat loss and lower weight. Filled with 995g of 900+ FP hydrophobic goose down and built with differential cut with mesh box baffles for maximum loft, fewer cold spots, and more stable warmth in severe cold.
-18°C / -24°C
1210-1450g
900+ FP
YKK #5 detachable two-way
7 sizes
23 x 23 x 23 cm
Adjustable hood
Warm hood with simple adjustment for a closer fit and better protection in severe cold.
Draft collar
Wide insulated draft collar wraps neck and helps seal in warmth as you move during sleep.
Face gasket
Soft insulated face gasket improves comfort and helps seal out cold air around face opening.
Shortened zipper
Knee-length zipper reduces heat loss and weight while keeping bag easy to use in gloves.
Internal zip pocket
Keeps small essentials close through the night.
Anatomical footbox
Shaped footbox gives feet more natural space and helps maintain warmth more efficiently.
Differential cut with mesh box baffles
Helps the down stay fully lofted, keeps warmth more even, and recovers loft quickly after compression.
Read moreDouble draft tubes
Two insulated tubes along zipper help block cold air and protect one of the main heat-loss zones.
Read moreAnti-snag zip guard
Reinforced zipper guard tape helps zipper run smoother and keeps lightweight fabric from catching.
Read more[instagram-feed feed=2]
ROCK FRONT 1000 3D Ultralight is built for harsh winter conditions where warmth matters more than extra versatility. Shortened zipper design helps reduce heat loss and save weight, while keeping bag simple and easy to use in gloves.
Updated version uses smoother, more durable YKK #5 zipper shortened to knee length. Zipper area is protected by dual insulated draft tubes and reinforced zipper guard tape to reduce snags and help seal out cold air.
3D construction uses differential cut, where outer shell is cut larger than inner shell so down chambers keep full loft instead of compressing from the inside. This helps reduce cold spots and maintain more even warmth across the whole bag.
Insulated draft collar wraps neck and helps hold warmth in place as you shift during sleep. Hydrophobic treatment on shell fabric and down also helps bag keep warmth longer in humid and condensation-heavy conditions.
Use case
- as a winter sleeping bag for sub-freezing backpacking trips
- as a mountaineering sleeping bag for harsh cold
Set includes
- sleeping bag
- compression sack
- mesh storage sack
* Total weight can vary by up to 2%.
** We continuously improve our products and reserve right to change accessories, hardware, colors, and fabric shades.
- insulated with 900+ fill power hydrophobic goose down
- differential cut with mesh box baffles for full loft, fewer cold spots, and quick loft recovery
- balanced insulation distribution through torso
- YKK #5 coil zipper shortened to knee length
- double draft tubes along zipper
- anti-snag zipper guard for smoother, easier zip use
- second slider for ventilation
- wide insulated draft collar
- adjustable hood
- soft insulated face gasket
- internal zip pocket
- anatomical footbox
- durable water-repellent finish on fabric and down
Temperature rating (Tcomfort / Tlimit): -18°C / -24°C | 0°F / -11°F
assumes sleeping mat with R-value 6+
Insulation: 900+ fill power hydrophobic goose down
Shell / lining: 10D Nylon Micro Ripstop DWR
Zipper: YKK #5 coil two-way zipper
Weight
- S Medium: 1210g (insulation weight: 895g) / 42.68 oz (insulation weight: 31.57oz)
- M Short: 1270g (insulation weight: 950g) / 44.79 oz (insulation weight: 33.51oz)
- M Medium: 1330g (insulation weight: 995g) / 46.91 oz (insulation weight: 35.09oz)
- M Long: 1395g (insulation weight:1040 g) / 49.20 oz (insulation weight: 36.68oz)
- L Short: (insulation weight: 1040g) / (insulation weight: 36.68oz)
- L Medium: 1450g (insulation weight: 1080g) / 51.14 oz (insulation weight: 38.09oz)
- L Long: 1520g (insulation weight: 1130g) / 53.61 oz (insulation weight: 39.85oz)
Compression sack: [weight missing]
Packed size: 23 x 23 x 23 cm / 9.1 x 9.1 x 9.1 in
Manufacturer: ROCK FRONT, Ukraine
Composition
100% nylon shell & lining / goose down insulation
Safety
PFAS-free / OEKO-TEX® Standard 100 / PFC-free DWR
Care note
Dry fully after every trip. Store loose, dry, and uncompressed — in a mesh storage bag or fully lofted. Do not store long-term in a compression sack. Learn more
Wash at 30°C
Do not bleach
Tumble dry low
Do not iron
Do not dry clean
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