ROCK FRONT All Season System UL Ultralight is the world's lightest four-season sleeping system that will give you a comfortable sleep all year round.
Using it in various combinations, you get a summer, demi-season and winter sleeping set.
The ROCK FRONT All Season System UL Ultralight L Medium sleeping system is designed for stocky people up to 188 cm tall.
Advantages of the sleeping system over a classic winter sleeping bag:
- One sleeping set for travelling all year round - the sleeping system combines four pieces of sleeping equipment, the whole set keeps you warm more efficiently, saves weight and equipment costs;
- Thanks to Cube technology, the sleeping system is 20% lighter and has improved thermal properties - cubic down packs have the optimal size and amount of filling, they retain more air than regular cells, keeping you warm in cold weather, thanks to this design, the insulation is always in place;
- Two independent layers of insulation guarantee reliable heat retention - the down packs of the inner and outer layers overlap each other's cold zones, which ensures uniform thermal insulation down to -15°C.
- Possibility to adjust the temperature at all levels - you can unzip the inner sleeping bag inside the system, open the outer quilt on the left or right, open the lower part of the quilt to ventilate the system in the leg area;
- The sheet preserves the integrity of the entire system - it securely connects your mat, pillow, inner and outer layer into a single system that does not slip or twist even when you are actively moving around in your sleep. Also, the sheet allows you to use 2 mats at once - the main one and an additional one, if you do not have a warm enough winter mat, or want to protect your inflatable mat from punctures with foam (mats are sold separately);
- Protection of the inner layer from condensation - during long winter hikes, moisture can accumulate inside the sleeping bag, in the case of a two-layer system, condensation is possible only in the upper layer, which is much easier to dry in camping conditions than a bulky winter sleeping bag.
The All Season System is an all-season sleeping system with a two-layer construction:
- the inner layer is the Rock Front Cube UL Bag, designed for the off-season and cool summer nights.
This is a down sleeping bag with an anatomical cocoon shape, which has an adjustable hood, a spacious t-shirt that provides comfort in the foot area, an internal pocket for a phone, power bank, valuables, etc.
It has an optimal length zip with a protective bar that allows you to comfortably get in and out of the sleeping bag.
Its minimalist design and compact size make it ideal for fast&light travel or cycling trips where ease of use, as well as minimal weight and volume of equipment are important.
- the outer layer is the Cube UL Quilt, which consists of a down duvet and a Rock Front Ultralight V2 sheet for the mat, which are zipped together to form a spacious and comfortable sleeping system with everything you would find in your home bed - sheet, duvet and pillow.
The updated model of the sheet has a larger pillow compartment, lighter weight and colour coding for convenience.
The elements of the system can be used separately or together, combining them to create a summer, demi-season and winter sleeping set for temperatures from +10°C to -15°C.
Thanks to zips on both sides and drawstrings on the top and bottom, the sleeping system can be ventilated from either side, adjusting the temperature throughout the night.
The filling of the sleeping bags is high-quality natural goose down Fill Power 870+ (confirmed by the IDFL laboratory in Switzerland) with hydrophobic impregnation, thanks to which the sleeping bag will remain dry for a long time even in high humidity.
Cube technology - cubic-shaped down packs have the optimal size and amount of filling, they retain more air than regular-shaped cells, keeping you warm in cold weather.
Thanks to this design, the insulation is always in place, and the sleeping system as a whole is 20% lighter and has improved thermal properties.
The material is a thin and durable nylon with hydrophobic impregnation, resistant to fluff, fibres and wind, its stability and abrasion resistance are achieved thanks to the thin Micro Rip-stop structure.
The set includes a compression case for transport and a mesh bag for storage.
Purpose of the ROCK FRONT All Season System UL Ultralight L Medium sleeping system: for hiking and mountain climbing, mountaineering.
Season:  winter, spring, summer, autumn.

Features of the sleeping system ROCK FRONT All Season System UL Ultralight L Medium:
- Maximum weight of the sleeping system, kg:   1.24 (43.8 oz)
   - Sheet weight, kg:  0.115 (4.1 oz)
   - Sleeping bag weight, kg:  0.63 (22.2 oz)
   - Blanket weight, kg:  0.415 (14.6 oz)
   - Cover weight, kg:  0.03 (1.1 oz)
- Comfort temperature of the sleeping system, °C:   - 10 - 15 (+ 14 + 5 °F)
- Extreme sleeping system temperature, °C:   - 25 (- 13 °F)
- Cube UL Quilt Comfort temperature: +10°C +5°C (+50 + 41°F)
- Comfort temperature of the Cube UL Bag: +5°C 0°C (+ 41 + 32 °F)
- Length, cm:   220.0 (86.6 in)
- Width (shoulders / hips / feet), cm:   90.0 / 60.0 / 55.0 (35.4 / 23.6 / 21.7 in)
- Package size, cm:  ∅ 25.0 x 50.0 (9.8 x 19.7 in) in case
- Exterior Material:   Nylon 10D 500T 25g/m²
- Filling:   
- Cube UL Quilt - goose down (Ukraine) Fill Power 870+, 250 g (8.8 oz) with hydrophobic impregnation
  - sleeping bag Cube UL Bag: L Medium - goose down (Ukraine) Fill Power 870+, 370 g (13.1 oz) with hydrophobic impregnation
- Inner material:   Nylon 10D 500T 25g/m²
- Ultralight V2 sheet material:  Nylon 10D 500T 25g/m²
- System transport case (not compression) and storage net
Features of the Cube UL Bag: L Medium:
- Internal zip pocket
- Ergonomic hood with drawstring
- Additional space for legs Foot Box
- Zip No. 3 YKK with two sliders
- Large insulated strip along the zip

Recommendations for use
- The sleeping bag is designed to be used with a sleeping pad - a camping mat that insulates the body from the cold ground.
- Fold the sleeping bag into the transport bag randomly each time - this will prevent the insulation from falling off and extend its service life.
- It is recommended that you wash your sleeping bag as little as possible, following the manufacturer's recommendations and using appropriate detergents, and using a liner will help you wash your sleeping bag less often.
- It is recommended to dry the sleeping bag whenever possible in the field, and be sure to dry and ventilate it well before storing it for a long time.
- Store the sleeping bag in the most fluffy, non-compressed state - this will extend the service life of the insulation, and it is even better to store the sleeping bag in a special mesh bag.

Warranty
The warranty period is 1 year.
If a branded product fails due to a manufacturing defect, we will repair or replace it free of charge at our discretion.
This warranty applies only to original, unaltered and unmodified products and workmanship.
This warranty does not cover damage caused by accident, improper care, negligence, normal wear and tear, weather conditions (wind, rain, fire, animals, etc.) or natural fading of colours and materials.
This warranty does not cover consequential damages or any other damages resulting from any defect in the product.
Damage not covered by the warranty may be repaired at a reasonable charge.