ROCK FRONT 650 Ultralight down sleeping bag

(5 customer reviews)

461.10$

Lightweight sleeping bag for sub-zero temperatures. Unique design makes it easy to convert into a blanket, quilt, or underquilt for a hammock.

Updated version is insulated with premium 900+ Fill Power down.

Choose the size
Estimated delivery dates: March 24, 2026 – April 10, 2026
Description

ROCK FRONT 650 Ultralight designed for winter, cold off-season and mountaineering. Its anatomical mummy shape effectively keeps warm, while the long central zipper makes it comfortable and multifunctional.

You can easily adjust the temperature at the top or in the feet by opening the zipper partially. If it gets really hot, you can unzip it completely and use your sleeping bag as a blanket.

Special elastic loops allow you to attach the sleeping bag to your mat in a quilt mode if you need more internal space but want to turn over comfortably without fear of drafts and blowing. Reinforced loops allow you to attach 650 Ultralight as an underquilt for a hammock.

Insulated with premium 900+ FP goose down, keeping it warm, lightweight and compact at the same time.

Options:

  • Mummy sleeping bag – for maximum warm keeping
  • Blanket – for warm nights
  • Quilt – to increase interior space (with Quilt Set Upgraded)
  • Underquilt – for sleeping in a hammock (with Underquilt Set Upgraded)
  • Double sleeping bag – two sleeping bags from Ultralight line can be zipped together

Features

  • ultra-lightweight and packable
  • insulated with 900+ Fill Power goose down
  • mesh baffles for uniform insulation and quick recovery
  • DWR impregnation of down and fabric
  • opens for ventilation and turns into a blanket
  • can be zipped with other sleeping bags of the Ultralight line
  • internal zippered pocket
  • anatomical footbox
  • wide insulated baffle along the zipper
  • wide insulated collar
  • adjustable hood

Safety:

  • OEKO-TEX Standard 100 guarantees that a garment is free from harmful chemicals
  • PFOS and PFOA chemicals free

* Total weight of the product can vary within 2%.

** We are constantly improving our products, therefore we reserve the right to change the configuration, accessories, colors and shades of fabrics.

Specifications

Temperature rating: (Tcomfort/Tlimit) -8°C / -13°C | 17°F / 9°F

Insulation: 900+ Fill Power hydrophobic goose down

Inner and outer material: nylon micro rip-stop 10den

Zipper: two way YKK #3

Weight:

  • S Medium: 830g (insulation weight: 565g) / 29.28 oz (insulation weight: 19.93 oz)
  • M Short: 900g (insulation weight: 610g) / 31.75 oz (insulation weight: 21.51 oz)
  • M Medium: 965g (insulation weight: 650g) / 34.04 oz (insulation weight: 22.93 oz)
  • M Long: 1015g (insulation weight: 690g) / 35.79 oz (insulation weight: 27.87 oz)
  • L Short: 1025g (insulation weight: 695g) / 36.16 oz (insulation weight: 24.52 oz)
  • L Medium: 1080g (insulation weight: 730g) / 38.10 oz (insulation weight: 25.75 oz)
  • L Long: 1135g (insulation weight: 770g) / 40.02 oz (insulation weight: 27.16 oz)

Compression sack weight: 60g / 2.12 oz

Compressed size: 23×20 cm / 9.1 × 7.9 in

Manufacturer: ROCK FRONT (Ukraine)

Additional information
Weight 0.7 g
Dimensions 22 × 32 × 19 cm
Color

Anthracite

,

Dark-Blue

,

Grey

,

Lemon

Temperature Rating

-5°C…-11°C

,

Under -11°C

Insulation

900+ Fill Power goose down

Technology

Box baffles

Extra Features

Blanket mode

,

Footbox ventilation

,

Inside pocket

,

Quilt mode

,

Underquilt mode

,

Zips with bags (YKK 3)

Shipping & Delivery

Shipping

Free worldwide shipping for orders from 100€ or 100$. If the order amount is less, you have the option to pay for shipping immediately.

Customs duties and VAT

These must be paid separately. You can find information about importing goods into your country here.

Delivery terms

We ship orders within 1-3 business days. Average delivery time is 8-20 days.