Ultralight 700 Sleeping bag

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 700 sleeping bag is designed for use in moderately sub-zero temperatures. It was engineered to minimize weight while providing thermal comfort in freezing conditions. The sleeping bag is made from 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 900 cuin fill power.

This is the fourth generation of the Ultralight series, consistently developed for over a decade in the spirit of the “light and fast” philosophy. This sleeping bag has been tested and used by Piotrek Krzyżowski during his solo ascents of 8,000-meter peaks.

The foot area features a spacious “foot box” that provides room for your feet and improves thermal comfort. A special structural allowance—a profile—is provided in the knee and hip areas to enhance ergonomics. The zippers are equipped with double insulated baffles with stiffening to prevent the fabric from snagging during closing. The hood and internal thermal collar are adjustable with an elastic cord placed in hidden tunnels. The sleeping bag uses three-dimensional H-shaped (DSH) baffles, which reduces weight and eliminates 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).
  • [Number] 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:

Temperature range of use:
T comf ♀ : -5°C
T limit ♂: -11° C;
T ext : -30° CInternal dimensions:
Length: 188 cm (M); 200 cm (L); 212 cm (XL).
Width at shoulders: 73 cm (M); 78 cm (L); 83 cm(XL)All Malachowski brand sleeping bags are manufactured and filled with down in Poland, in the Beskid Mountains, in Dębowiec.