Therm-a-Rest Space Cowboy 45F/7C Sleeping Bag

Name: Therm-a-Rest Space Cowboy 45F/7C Sleeping Bag
Brand: Therm-a-Rest
Price: 146.79 CAD
Availability: InStock

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About this product

The Therm-a-Rest Space Cowboy is a synthetic sleeping bag rated to 45F (7C), designed for three-season camping whether on a road trip or a backcountry outing. It weighs 1 lb 12 oz (0.78 kg) and packs down to a compact 8 x 10 in (20 x 26 cm), making it a practical choice for weight-conscious sleepers. The fill is eraLoft Polyester Hollow Fiber, a proprietary synthetic insulation that traps air for warmth, retains loft when wet, and dries quickly. Both the shell and lining are constructed from GRS-certified 100% recycled nylon ripstop, with the shell treated with a DWR finish for moisture resistance. Fill weight comes in at 1 lb 7 oz (0.65 kg), and the bag fits sleepers up to 72 in (183 cm) tall, with a shoulder girth of 62 in (157 cm), hip girth of 57 in (145 cm), and a foot box of 46 in (117 cm). Heat-mapped zoned insulation distributes fill where it is most needed. SynergyLink Connectors, compatible with sleeping pads up to 3 inches thick, secure the bag to a pad to reduce drafts, while a YKK anti-snag zipper protects the shell fabric. A combo stuff and storage sack is included.

Category: Sleeping Gear
Brand: Therm-a-Rest
Material: eraLoft polyester hollow fiber, 100% recycled nylon ripstop, 100% recycled nylon ripstop with durable water repellent (DWR)
Color: CELESTIAL
Size: 8 x 21 inches
Fill: eraLoft polyester hollow fiber
Long: 58 inches
Shell: 100% recycled nylon ripstop with durable water repellent (DWR)
Small: 56 inches
Gender: Unisex
Lining: 100% recycled nylon ripstop

What people are saying

Reviewers consistently praise the Space Cowboy 45 for its impressive lightweight and packability among synthetic bags, its water-resistant synthetic fill that stays dry and insulating in wet or humid conditions, and the handy pad-attachment straps that prevent sliding off at night. The soft fabric and mummy-style fit with a draft collar also earn positive mentions. The most common complaint is that the temperature rating is misleading: the true comfort rating is closer to 52F, and multiple reviewers found themselves cold at or below 45F, making it a strict warm-weather-only bag. Some also note the foot box feels a bit snug and that the lack of compression straps makes it slightly bulky for backpacking compared to down alternatives.