Ultralight 500 Sleeping bag

ULTRALIGHT 500 is our flagship model, distinguished by its minimalist design, anatomical mummy shape, spacious foot box, and advanced spatial down chamber construction.

Designed to minimize weight and provide thermal comfort in both moderate and cold temperatures. The sleeping bag is made of super lightweight Airtastic® 7D material, 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 fill power of 900 cuin.

This is the fourth generation of the Ultralight series, developed with the idea of “light and fast.” A spacious “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 constructional allowance – profiling – is provided, which increases ergonomics. Double insulation flaps with stiffening are used on the zippers to prevent the material from getting caught during closing. The hood and internal thermal collar are adjustable with a drawstring located in hidden tunnels. The sleeping bag features H-shaped spatial chambers (DSH), which allows for weight reduction and the elimination of thermal 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 and Internal Thermal Collar
  • Specially shaped spacious “foot box” ensures optimal thermal comfort and freedom for the feet.
  • Adjustable thermal collar improves thermal properties, preventing heat loss around the head. 
• Innovative Chamber Construction:
  • Spacious H-shaped chambers (DSH) with a “covered seam” (patent no. 143773).
  • 18 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.
  • 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
• Cut: The sleeping bags are wider, which positively impacts user comfort
• Down chambers: Optimized number of down chambers. Peripheral chambers, allowing the insulation to migrate freely between the top and bottom of the sleeping bag.
• Compression Bag: Simple construction, sewn using French seam technology

Technical data:

Temperature range of use:
T comf ♀ : -2°C ;
T limit ♂: -8 ° C ;
T ext : -26 ° C ;

Order fulfillment time is 1-4 business days.