Quick Answer

The Kelty Women's Cosmic Synthetic 20 is a budget-friendly, three-season synthetic bag that balances lightweight warmth with easy care. It's best for campers who want reliable performance without the premium price of down, and who prefer a bag that handles damp conditions well.

Who Is This Sleeping Bag For?

The Women's Cosmic Synthetic 20 is designed for backpackers and car campers who want a warm, compressible bag that doesn't break the bank. Its synthetic fill makes it a practical choice for damp climates or for anyone who expects to wash their bag frequently, since synthetic dries faster and retains less odor than down.

How Does It Compare to the Cosmic Down 20?

The Cosmic Down 20 uses goose down insulation and trapezoidal baffle construction for better warmth-to-weight ratio and packability. The synthetic version uses CirroLoft ECO insulation, which is heavier and less compressible but performs better when wet and costs significantly less. If you prioritize weight and pack size, the down model is the better choice; if you camp in wet conditions or want a lower price, the synthetic bag makes more sense.

What Are the Key Materials and Construction Details?

The bag features a durable nylon shell and a silky taffeta liner, both made from fully recycled fabrics. The CirroLoft ECO fill is also recycled. A zippered stash pocket lets you keep small items like a phone or lip balm close at hand. The women's-specific cut provides extra insulation in the footbox and torso area compared to unisex models.

Frequently Asked Questions

What temperature rating does this bag have?

The bag is rated to 20°F (-6°C) for a comfort limit typical of three-season use. This means it should keep most sleepers warm down to about 20°F, though individual comfort varies based on metabolism, clothing, and tent setup. Use this bag for spring, summer, and fall trips; consider a warmer bag or liner for winter camping below 20°F.

How much does it weigh and how packable is it?

Exact weight is not listed in the catalog facts, but synthetic bags in this class typically weigh between 3 and 4 pounds. The CirroLoft ECO fill compresses reasonably well, though not as tightly as down. It will take up more pack space than a down bag of the same temperature rating. If you're counting every ounce or need a very small packed size, consider the Cosmic Down 20 instead.

How do I clean and care for this synthetic bag?

Synthetic bags are machine-washable on a gentle cycle with mild detergent, then dried on low heat. Avoid fabric softeners and bleach. Because synthetic fill doesn't clump like down, drying is faster and less fussy. Store the bag loosely in a large cotton or mesh sack, not compressed in its stuff sack. Regular washing every few trips helps maintain loft and hygiene. Synthetic bags are more forgiving than down when it comes to cleaning.

Is this bag suitable for side sleepers?

The bag has a women's-specific cut with a natural-fit footbox, which provides more room for your feet. Side sleepers may find the mummy shape slightly restrictive, but the generous footbox helps. If you move a lot in your sleep, consider a semi-rectangular bag or a roomier mummy model. Try the bag in-store or check return policies if you're a restless side sleeper.

Product Facts

  • Women's Cosmic Synthetic 20 Sleeping Bag: PERFECT BALANCE OF LIGHTWEIGHT WARMTH You shouldn’t have to move heaven and earth to sleep under the stars! That’s why we made the Cosmic Synthetic light in your pack and easy on your budget. This three-season superstar is constructed of fully recycled fabrics and fill—with a durable nylon shell, silky taffeta liner, and CirroLoft ECO insulation for lightweight, compressible warmth. A zippered stash pocket keeps… Recycled materials reduce environmental impact without sacrificing durability or comfort. The CirroLoft ECO fill provides reliable warmth even if it gets damp, and the stash pocket adds convenience for small essentials.