Ultralight 300 Sleeping bag

The 300 ULTRALIGHT sleeping bag is our flagship model – minimalist design, anatomical mummy shape, spacious foot box, and advanced spatial down chamber construction. 

The ULTRALIGHT 300 is designed to minimize weight and provide thermal comfort in moderate temperatures. The sleeping bag is made of super lightweight Airtastic® 7D material from the Japanese company Toray®. Despite its low weight, the fabric is strong, durable, and pleasant to the touch.

The sleeping bag is filled with natural Polish down with a fill power of FP 900 cuin.

This is the fourth generation of the ultralight series, evolving with the idea of “light and fast.”

A special spacious “foot box” is shaped around the feet, creating space for our feet and improving thermal performance. At the height of the knees and hips, a special constructional allowance – profiling – is provided to improve ergonomics. Minimalist insulation flaps with stiffening are used on the zippers to prevent the material from getting caught when closing the zipper. The hood is adjusted with a drawstring in special hidden internal tunnels. The sleeping bag features H-shaped spatial chambers (DSH), a solution that ensures low weight and eliminates cold bridges.

Key Features:

• Ultralight and Durable Material:
  • Made of super lightweight Airtastic® 7D fabric from the Japanese manufacturer Toray®.
  • Material with a weight of 19g/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 fill power of 900 cuin and a high down ratio of 98/2. 

• Anatomical Mummy Shape:
  • Advanced construction adapted to the body’s silhouette.

• Spacious Foot Box:
  • Specially shaped spacious “foot box” ensures optimal thermal comfort and freedom for the feet. 

• Innovative Chamber Construction:
  • Spacious H-shaped chambers (DSH) with a “covered seam” (patent no. 143773). 
  • 17 down chambers for optimal down distribution and effective insulation. 

• Ergonomic Profiling:
  • Constructional 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 insulation flap and “anti snag” system. 
• “Spring” snap preventing the zipper from opening unintentionally. 
• Hood adjustment hidden in a special tunnel. 
• Simplified compression bag sewn with a French seam (bottom base 12cm x 12cm, height 22cm, packed height 18cm – size L). 
• Cotton storage bag included.

Evolution of the Ultralight Series: What We Changed Compared to the Previous Version: 

• Fabric: The fabric used now has a denser Rip-Stop weave, making it stronger and more durable 
• Down: In the current generation of sleeping bags, we use down with a higher fill power, up to 900 cuin 
• Down chambers: Optimized number of down chambers. Peripheral chambers, allowing the insulation to migrate freely between the top and bottom of the sleeping bag.
• Cut: The sleeping bags are wider, which positively impacts user comfort Compression Bag: Simplified, sewn using French seam technology

Technical specifications:

Temperature range of use:
T comf ♀ : 2°C
T limit ♂: -4 ° C;
T ext : -18 ° C

All Malachowski brand sleeping bags are manufactured and filled with down in Poland, in the Beskid Mountains, in Dębowiec.