ULTRALIGHT is our flagship series, distinguished by its minimalist design, anatomical mummy shape, spacious foot box, and advanced three-dimensional down baffle construction.
The ULTRALIGHT 600 sleeping bag is a model designed for use in moderate and sub-zero temperatures. Engineered to minimize weight while ensuring thermal comfort in freezing conditions, it is crafted from the super-light Airtastic® 7D fabric supplied by the Japanese company Toray®. Despite its low weight, this fabric is strong, durable, and pleasant to the touch.
The sleeping bag is filled with Polish natural down with a loft of 900 cuin.
This is already the fourth generation of the Ultralight series, consistently developed in line with the “light and fast” philosophy for over a decade.
An ample “foot box” is used in the foot area, providing space for the feet and improving thermal comfort. In the knee and hip area, a special structural allowance—3D profiling—has been designed to enhance ergonomics. Double insulation draft tubes with stiffeners are used along the zippers to prevent the fabric from snagging when closing. The hood and internal thermal collar are adjustable with an elastic cord placed in hidden tunnels. The sleeping bag features H-shaped box chambers (DSH), which allows for weight reduction and the elimination of thermal bridges.
Key Features:
- Ultralight and Durable Fabric:
- Made from super-light Airtastic® 7D fabric by the Japanese manufacturer Toray®.
- The material has a weight of 19 g/m², woven from 7D fibers in a Rip-Stop weave and SL (Super Lightweight) technology.
- Highest Quality Polish Down:
- Filled with natural Polish down with a 900 cuin fill power and a high down content ratio of 98/2.
- Anatomical Mummy Shape:
- Advanced body-conforming construction.
- Spacious Foot Box and Internal Thermal Collar:
- The specially shaped, spacious “foot box” ensures optimal thermal insulation and freedom for your feet.
- The adjustable thermal collar improves thermal properties, preventing heat loss around the neck and head.
- Innovative Baffle Construction:
- Three-dimensional H-shaped (DSH) baffles with a “hidden seam” (our patent no. 143773).
- 63 of down chambers for optimal down distribution and effective insulation.
- Ergonomic Profiling:
- Structural allowance in the hips and knees for better ergonomics and freedom of movement.
- Practical Details:
- Internal pocket for small items.
- Two-way YKK® main zipper (130 cm) with an insulated baffle and “anti-snag” system.
- A “spring” type snap to prevent the zipper from opening on its own.
- Hood adjustment hidden in a special tunnel.
- Simple compression sack sewn with a French seam (high mechanical durability).
- Cotton storage sack included.
Evolution of the Ultralight Series – What We Changed Compared to the Previous Version:
- Fabric: The current fabric has a denser Rip-Stop weave, making it stronger and more durable.
- Down: In the current generation of sleeping bags, we use down with higher loft, up to 900 cuin.
- Cut: The sleeping bags are wider, which positively impacts user comfort.
- Compression Sack: Simple construction, sewn with French seam technology for high tear resistance.
Technical data:
| size | total weight | filling weight – down |
| M | 750 g | 540 g |
| L | 835 g | 600 g |
| XL | 960 g | 670 g |
Temperature range of use:
T comf ♀ : -7°C
T limit ♂: -14° C;
T ext : -35° C
Internal dimensions:
Length: 188 cm (M); 200 cm (L); 212 cm (XL).
Width at shoulders: 71 cm (M); 78 cm (L); 82 cm(XL)
All Malachowski brand sleeping bags are manufactured and filled with down in Poland, in the Beskid Mountains, in Dębowiec.
