Looking for a reliable and comfortable sleeping bag for your next backpacking adventure? The Kelty Cosmic Down sleeping bag series offers a compelling blend of affordability, performance, and sustainability. Built with 550 fill down insulation, these bags provide exceptional warmth-to-weight ratio, making them ideal for minimizing pack weight without sacrificing comfort. Recycled materials, including nylon taffeta and polyester taffeta, contribute to both the bag's durability and its environmentally friendly design.Beyond its lightweight and sustainable construction, the Kelty Cosmic Down series boasts thoughtful features designed to enhance your sleep experience. An expanded footbox provides ample space for natural movement and better rest, while full-length and neck draft tubes (on select models) minimize heat loss. Available in a range of temperature ratings and styles for both men and women, the Kelty Cosmic Down sleeping bags are a versatile choice for various camping and backpacking scenarios, ensuring a cozy and restful night under the stars.
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Insulation and Materials
The Kelty Cosmic Down sleeping bags utilize 550 fill down insulation, known for its loft, lightweight nature, and packability. This makes them ideal for backpacking adventures where weight is a crucial factor. The outer shell is constructed from recycled nylon taffeta, offering durability and softness, while the inner lining uses recycled polyester taffeta for a comfortable feel against the skin. Both fabrics are treated with a Durable Water Repellent (DWR) finish, ensuring protection against dampness.

The 550 fill down itself is treated for water resistance, adding an extra layer of protection in humid or wet conditions. This feature is especially valuable for maintaining warmth and comfort during unexpected weather changes.

Design and Features
The sleeping bags boast several thoughtful design elements. A noteworthy feature is the expanded natural fit foot box, providing ample room and promoting better sleep. This roomy design is beneficial for different sleeping positions, enhancing comfort throughout the night.

Other features include a full-length draft tube along the zipper to prevent heat loss, and the 0° and 20° bags also have a draft tube at the neck for added warmth. The trapezoidal baffle construction contributes to thermal efficiency, enhancing the overall warmth of the sleeping bag.

Styles and Sizes
The Kelty Cosmic Down sleeping bags are available in various styles and temperature ratings to cater to different preferences. Men's styles include regular length bags with 0°, 20°, and 40° ratings, suitable for individuals up to 6' tall. These come with a stuff sack for convenient packing.

Women's styles offer a 20° regular length bag with a tapered shape for weight savings, designed to fit individuals up to 5'8" tall and also includes a stuff sack for easy portability.
Final Verdict
The Kelty Cosmic Down sleeping bag series offers a compelling combination of affordability, packability, and comfort. The use of high-quality, recycled materials along with well-thought-out design features makes them suitable for a wide range of camping and backpacking scenarios.

The water-resistant down insulation and DWR-treated fabrics provide confidence in less-than-ideal weather conditions. If you're searching for a reliable and comfortable sleeping bag for your outdoor adventures, the Kelty Cosmic Down series is certainly worth considering. The expanded footbox is a particular standout feature for enhanced comfort.