Kelty Cosmic Sleeping Bag

The Cosmic Synthetic 40 is rated for a comfort temperature of 37°F (3°C) and a limit rating of 27°F (-3°C). It is designed primarily for three-season backpacking, making it a reliable choice for spring, summer, and early autumn trips.

This bag uses CirroLoft synthetic insulation, which is heavier and bulkier than down but performs significantly better in damp or humid conditions. Unlike down, which loses its loft and warmth when wet, synthetic insulation retains its thermal properties even if it gets moist.

Yes, the bag is designed to fit users up to 6 feet (183 cm) tall. The total length of the bag is 78 inches, providing enough room for a comfortable fit at that height.

Yes, the shell features a PFC-Free DWR (Durable Water Repellent) coating. While it is not waterproof, this finish helps shed light moisture and condensation, protecting the insulation from getting soaked.

The natural-fit footbox is shaped to allow your feet to rest in a more relaxed, upright position rather than forcing them into a pointed orientation. This extra space prevents the insulation from being compressed by your toes, which helps keep your feet warmer throughout the night.

No, this model does not include a draft collar. It relies on a standard mummy hood design to retain heat, which is typical for a bag in this temperature rating and weight class.