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Lightweight and multifunctional! The Quilt 450 is a comfortable three-season sleeping system that offers a wide array of practical applications making it the perfect companion for autumn adventures. Its versatile design easily adapts to changing temperatures. When the nights are warm, simply unfasten the quilt to utilize it as a lightweight and practical duvet. However, as the mercury drops, with the footbox tightened and fastened to the sleeping pad, it will provide effective protection from the cold.

Designed with a focus on ease of use and practicality, the Quilt 450 features an intuitive mattress attachment system, based on two elastic straps with clasps. The elastic loops fit mattresses ranging from 50 to 60 cm in width. While resting in a conventional sleeping bag, the part of the down at the bottom becomes compressed due to the sleeper's body weight. The open-bottom design of the Quilt tackles this issue, allowing the full insulating potential of the down in the chambers, allowing you to benefit from uncompromised warmth throughout the night. At the core of its performance lies the premium 850 FP Polish down filling and the proven Pertex® Quantum fabric, a combination that ensures exceptional compressibility and comfort. The 60 cm zipper closure and the use of an elastic drawstring allow the creation of a closed footbox, which is additionally sealed with a longitudinal down chamber.

Down-filled Quilt 450 is a must-have for every outdoor enthusiast seeking a comfortable and unrestricted way of sleeping outdoors. Ultralight and taking up minimal space in the backpack, will become a permanent part of the gear list for colder months. It will be appreciated especially by travelers, who focus on shedding unnecessary weight without compromising on warmth and comfort.

More Information
Down quality850 FP
Total weight740 g
Down weight450 g
Weight of unfilled comforter290 g
Comfort temperature-1 ℃
Limit temperature-7 ℃
Maximum user height185 cm
Length195 cm
Width (top/bottom)65/50 cm (130/100 cm laying flat)
Stuffsack’s dimensions (height/diameter)25/17 cm
Stuffsack’s volume5 l
Number of down chambers15
Product features
  • Fill: 850 Fill Power ethically sourced Polish goose down
  • Shell and liner: Pertex® Quantum 29 g/m², 15-denier ripstop, DWR finish (100% nylon)
  • Short YKK® zip allowing to create a footbox
  • Down-filled zip insulating tube
  • Semi-trapezoid shape
  • Can by fully opened and used as a flat blanket
  • Open footbox design with draw cord and insulating tube
  • Construction: H-shaped chamber design
  • Continuous down chambers
  • Down-filled tube around the neck
  • Can be opened and ventilated at the footbox
  • Easy mattress attachment system included
  • Stuffsack and storage sack included

Expert quality


Years of breeding experience, a specific climate and research facilities are the secrets behind the excellent parameters of Polish down, which is considered to be the best in the world. Despite technological advancement and attempts to make artificial insulation that would be just as reliable, down still remains unrivaled.

Ethical sourcing

We only use down from certified Polish producers. Thanks to their geographical proximity, we can monitor the production. We are absolutely sure down used by Cumulus has been ethically sourced. It is from free-range geese that have access to water. The excellent breeding conditions are also reflected in the down’s high quality.


Pertex® and Toray®, two fabrics we commonly use in our products, are made in Japan. Renowned in the outdoor world, they are both high-performers and have an impressive resilience considering their lightweight structure. At 19g/m2 Toray Airtastic® is the lightest downproof fabric in the world.