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ROCK FRONT 450 Ultralight down sleeping bag
405.51$
Lightweight three-season sleeping bag with a unique design that easily converts into a blanket, quilt or underquilt for a hammock.
Updated version is insulated with premium 900+ Fill Power down.
Choose the sizeSize and packaging guidelines
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| Specification | Chair | Armchair | Sofas |
| Height | 37" | 42" | 42" |
| Width | 26.5" | 32.5" | 142" |
| Depth | 19.5" | 22.5" | 24.5" |
| Assembly Required | No | No | Yes |
| Packaging Type | Box | Box | Box |
| Package Weight | 55 lbs. | 64 lbs. | 180 lbs. |
| Packaging Dimensions | 27" x 26" x 39" | 45" x 35" x 24" | 46" x 142" x 25" |
Estimated delivery dates: February 2, 2026 – February 19, 2026
Description
ROCK FRONT 450 Ultralight is a mummy sleeping bag with a long central zipper. This design is the most effective in keeping warm, while the long central zipper adds functionality.
You can partially open the sleeping bag for ventilation at the top and at the feet, or unzip it completely to use it as a blanket if it gets really hot.
Loops along the zipper allow you to attach the sleeping bag to your sleeping mat like a quilt to get more internal space. The outer loops allow using the sleeping bag as an underquilt for a hammock.
Insulated with premium 900+ FP hydrophobic goose down, keeping it warm, lightweight and compact at the same time.
Options:
- Mummy sleeping bag – for maximum heat 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) 0°C / -6°C | 32°F / 21°F
- Insulation: 900+ Fill Power hydrophobic goose down
- Inner and outer material: nylon micro rip-stop 10den
- Zipper: two way YKK #3
- S Medium: 650g (insulation weight: 385g) / 22.93 oz (insulation weight: 13.58 oz)
- M Short: 710g (insulation weight: 430g) / 25.04 oz (insulation weight: 15.17 oz)
- M Medium: 745g (insulation weight: 450g) / 26.28 oz (insulation weight: 15.87 oz)
- M Long: 780g (insulation weight: 470g) / 27.51 oz (insulation weight: 16.58 oz)
- L Short: 800g (insulation weight: 485g) / 28.22 oz (insulation weight: 17.11 oz)
- L Medium: 840g (insulation weight: 515g) / 29.63 oz (insulation weight: 18.17 oz)
- L Long: 875g (insulation weight: 540g) / 30.86 oz (insulation weight: 19.05 oz)
- Weight:Compression sack weight: 45g / 1.59 oz
Additional information
| Weight | 0.7 kg |
|---|---|
| Dimensions | 22 × 32 × 19 cm |
| size |
S Medium ,M Short ,M Medium ,M Long ,L Short ,L Medium ,L Long |
| color |
Anthracite ,Lemon |
| insulation |
900+ Fill Power goose down |
| technology |
Box baffles |
| temperature-rating |
-5°C…-11°C ,+3°C…-4°C |
| extra-features |
Blanket mode ,Footbox ventilation ,Inside pocket ,Quilt mode ,Underquilt mode ,Zips with bags (YKK 3) |
Reviews (5)
5 reviews for ROCK FRONT 450 Ultralight down sleeping bag
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.
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Maksym –
I have not had an opportunity to test the sleeping bag yet but the thoughtfulness of the design and construction quality breeds confidence. I am extremely pleased with the shipping speed. It took only a week to deliver it to the UK from Ukraine.
Maksym –
I have tested this sleeping bag trekking down the Jordan Trail in dessert conditions of Wadi Rum for two weeks. Provides very comfortable sleep up to 0 degrees. At -2 I slept OK but had to put a fleece over base layer and tighten the hood so that very little of my face was exposed. It dries quick and weighs very little.
Store manager ROCK FRONT –
Thanks for your review!
Valerii –
Overall, the sleeping bag is not bad, but this zipper is not suitable for use in sleeping bags in general. It fastens well, but bites fabric when you unzip it. You can unzip the zipper from the sleeping bag only with two hands, and you still need to find the zipper lock, in the upper position it is located together with the collar drawstrings. If you sleep in a jacket and there is little space in the sleeping bag, it will be quite problematic to unzip it, and if the zipper gets stuck on top, you will have to suffer until you open the sleeping bag. If the manufacturer wanted to get the minimum weight, they could have made a normal zipper, for example, 2/3 of the way up, and if you need a blanket, you can buy a quilt.
Update: review of the previous version
Store manager ROCK FRONT –
Thank you for your review.
Yes, sometimes zipper getting stuck when you opening the sleeping bag. This is mainly due to the automatic zipper, which prevents unauthorized opening and blocks the reverse. This problem is especially noticeable during the first use, but later you begin to understand how this zipper works and it stops biting the fabric.
We are working on solving this problem and we are confident that the next iteration of Ultralight sleeping bags will retain all their features and become more convenient to use.
Olexandr –
Some are just wonderful! Perfect seams, no threads sticking out anywhere! Very high level of sewing. I would like a greater variety of colors, perhaps some other design solutions.
Ihor –
Good day to you all! I’ve had a lot of sleeping bags, but this one is my favorite so far. pleasant to the touch, light and compact (which sometimes makes a big difference), warm – it keeps the temperature optimally and stays dry when the humidity is high! is it really made in Ukraine? it’s great! thanks!