Kelty Cosmic Synthetic Fill 40-Degree Backpacking Sleeping Bag | Lightweight & Packable

Kelty Cosmic Synthetic Fill 40-Degree Sleeping Bag

Backpacking often demands a balance of weight, warmth, and space. The Cosmic Synthetic Fill bag leans into that balance with a three-season design that blends lightweight construction and thoughtful details. Built around CirroLoft synthetic insulation, it aims to deliver reliable warmth without a heavy backpack when trail conditions dip into damp or cool territory.

Warmth that travels with you

The CirroLoft insulation maintains loft under varied conditions, helping to minimize cold spots and provide even coverage. The bag covers a temperature range from 0 degrees to 40 degrees, offering flexibility across spring, summer, and autumn nights. While outcomes depend on factors like clothing and shelter, this insulation setup can support comfortable nights when the air turns chilly or moist.

• Lightweight construction at about 2 lb 6 oz in regular size (non compressed).
• Captures warmth efficiently with compressible synthetic fill for a compact pack.
• Retrofits easily into the included compression stuff sack for minimalist packing.

Thoughtful design for real-world camping

The Cosmic Synthetic Fill is designed to fit a wide range of sleepers, with a natural, roomy footbox to keep toes moving and a length that accommodates up to 6 ft 6 in. The regular size fits sleepers up to 6 ft, and you’ll find a handy exterior stash pocket for overnight essentials inside the tent. The soft nylon taffeta lining adds a touch of comfort during late-night wriggles and pre-dawn stretches.

• Footbox room reduces toe crowding and promotes natural movement.
• Exterior stash pocket keeps small items accessible inside the tent.
• Soft nylon taffeta fabric enhances comfort against the skin.

Packability and durability you can count on

On the trail, packability matters. This bag weighs about 2 lb 6 oz in regular length and packs down to a 15 x 8 in size when non-compressed, with weight nudging up to 4 lb 11 oz depending on the temperature rating and fill. An integrated compression sack helps you minimize bulk, while the rugged Kelty build is designed for years of outdoor use in campground, trek, or backcountry sites.

• Integrated compression sack for tidy packing.
• Rugged construction backed by Kelty reliability.
• Colorway Duffel Bag Green and Smoke for outdoor versatility.

Ultimately, the Cosmic Synthetic Fill bag is a practical option for hikers who value warmth, lightness, and simple packing without sacrificing tent-space or comfort on the trail. It invites you to imagine comfortable sleep after a long day, with warmth closer to your core and room to move at night.