Therm-a-Rest Space Cowboy 45F/7C Synthetic Mummy Sleeping Bag – Small, Celestial

Lightweight warmth for warm-weather adventures

The Space Cowboy invites you to sleep beneath the stars with reliable warmth without the bulk. Its eraLoft synthetic insulation uses hollow fibers to trap air, delivering steady warmth while staying light. Even when damp, it preserves loft and dries quickly, helping you reset after a misty dawn or a light drizzle at camp.

Weighing under two pounds, this mummy bag offers a favorable warmth-to-weight balance. With a comfort rating of 45F/7C, it suits warm-season nights—from roadside campsites to backcountry spots. The shell and liner are crafted from soft, durable, GRS-certified 100% recycled nylon, combining a gentle feel against the skin with eco-conscious materials. An anti-snag YKK zipper minimizes tears during entry and exit, while SynergyLink Connectors secure the bag to your sleeping pad, reducing drafts and keeping warmth where you expect it.

Smart design for efficient sleep

Heat-mapped Zoned Insulation places loft where body heat concentrates, delivering an exceptional warmth-to-weight balance. The precision-tuned mummy fit minimizes drafts without feeling restrictive. Paired with pad integration, the design helps limit cold spots and wasted space for a more comfortable night under the open sky.

Key features

• EraLoft insulation traps air for warmth and fast-drying performance
• Heat-mapped zoned insulation concentrates warmth where you need it
• Recycled nylon shell and liner offer a soft feel with eco-friendly credentials
• SynergyLink Connectors attach to your pad for an integrated sleep system
• Anti-snag YKK zipper ensures smooth entries and exits

Ideal uses

• Warm-weather backpacking, car camping, and summer road trips
• Sleep setups where moisture or dew is common, thanks to quick-dry insulation
• Travel-friendly gear for light packs and rapid campsite transitions

With a compact form and thoughtful features, the Space Cowboy is a versatile option for campers who value warmth, efficiency, and sustainability without extra bulk. Actual comfort will vary with conditions and personal preference.