Kelty Cosmic Sleeping Bag

As the name suggests, this bag is rated for 20 degrees Fahrenheit. It is designed for shoulder-season camping, meaning it performs best in early spring through late autumn when temperatures hover around or slightly above freezing.

The Cosmic 20 uses a mummy shape, which is designed to be thermally efficient by keeping the insulation close to your body. While it includes a spacious foot box for comfort, those who prefer a lot of room to sprawl might find the tapered mummy cut restrictive.

The bag features a water-resistant finish on the shell to help repel light moisture and condensation. However, it uses 550-fill duck down, which can lose its insulating properties if it gets soaked, so it is best used in dry to moderately damp environments rather than heavy rain.

No, this specific model has a maximum user height of 68 inches, or 5 feet 8 inches. If you are taller than that, you will likely find the bag too short to comfortably accommodate your height.

The bag includes a full-length zipper equipped with a draft tube, which acts as a barrier to prevent cold air from seeping through the zipper teeth. It also features a draft collar to help seal in your body heat around the neck and shoulder area.

At 3.94 lbs, it is a solid choice for entry-level backpacking or shorter trips where pack weight is a consideration. While it is not an ultralight bag, it offers a good balance of warmth and packability for the price.