The Quilt 600 is for people who like sleeping close to nature, value low weight and freedom, yet do not want to give up comfort in the backcountry. It is a comfortable alternative to a classic sleeping bag that gives a sense of space and flexibility in any position, on your side, on your back or with knees tucked. Aimed at experienced users, it can serve as a winter-ready sleep system.

Instead of a layer of insulation under your back, the quilt uses your sleeping pad as the primary barrier to ground chill. This lets all the down loft work where you need it most: from above and along the sides. The Quilt 600 features H-shaped baffles and 21.2 oz of ethically sourced Polish goose down with exceptional 900 Fill Power, delivering full thermal efficiency for overnight comfort even below 14 °F, while keeping packed size compact. In such demanding conditions, a high-quality, warm sleeping pad is essential and thorough head protection for the sleeper is required. The Toray® Airtastic fabric at 0.56 oz/yd² delivers exceptional lightness, a pleasant hand feel and excellent breathability. A short YKK® zipper 23.6 in long and an elastic drawcord let you close the footbox on colder nights, and a second drawcord regulates the opening around the neck. Both the zipper line and the neck adjustment are insulated with specially designed down-filled tubes to reduce the exchange of warm air with cold air from outside. In warmer weather, open the zip to turn it into a light and airy blanket. A practical pad attachment using elastic straps with buckles allows fast, intuitive adjustment and keeps everything in place through the night. Elastic loops are compatible with pads 19.7 to 23.6 in wide, so the quilt stays stable even when you change position.

At Cumulus® we have refined quilt designs for years, testing them in the real world from mountain bivouacs to minimalist fast & light trips. The Quilt 600 brings that experience together with premium materials in a product tuned down to the details. It excels whenever low weight, a compact pack size and reliably warm sleep in harsh, sub-zero conditions matter.