Therm-A-Rest Space Cowboy 45F/7C Sleeping Bag Comfort Rating 11°C
*GET 50% OFF A THERM-A-REST AIR HEAD DOWN PILLOW WHEN YOU BUY THIS SLEEPING BAG*
WARM WEATHER SLEEPING BAG WITH WATER -RESISTANT ERALOFT™ INSULATION FOR DURABLE AND LIGHTWEIGHT PERFORMANCE AT A GREAT VALUE
The Space Cowboy sleeping bag welcomes the idea of sleeping out under the stars with the worry-free warmth of synthetic eraLoft™ insulation. Its hollow fibres allow it to retain warmth even when wet—shrugging off morning dew and drying out super fast. Weighing less than two pounds and with a comfort rating of 45F/7C, you’ll be plenty warm all summer, whether you’re road tripping or heading deep into the backcountry. Shell and liner are made of a light and soft, GRS-certified 100% recycled nylon and an anti-snag YKK® zipper keeps them free of accidental tears. For optimal efficiency SynergyLink™ Connectors mate the bag to your sleeping pad, preventing drafts and cold spots. The precision-tuned fit makes sure you have the space you need, while eliminating unnecessary drafts and weight.
FEATURES OF THE COWBOY 45
- Recycled Shell & Liner: GRS-certified 100% recycled fabrics are eco-friendly while being lightweight, soft and durable; anti-snag YKK zipper ensures easy entries and exits and prevents tears.
- eraLoft™ insulation: Efficient and compressible, our proprietary synthetic insulation uses hollow fibres to trap air and boost warmth without added weight; dries fast and retains loft and warmth even when wet.
- SynergyLink™ Connectors: Removable ultralight straps create a secure bag-to-sleeping pad connection that optimises the comfort and thermal efficiency of your entire sleep system. SynergyLink Connectors function best with regular sized sleeping pads that are 3 inches thick or less when inflated.
- YKK® Anti-Snag Zipper: Prevents accidental tears and eases entries and exits.
- Heat-Mapped Zoned Insulation: Delivers an elite warmth-to-weight ratio by allocating insulation to where you need it and reducing it where you don’t.
- Combo stuff and storage sack included.
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Features
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Specifications
Regular
Weight - 780g
Width - 31"
Length - 80"
Fits - 183cm
Girth, Shoulder - 157cm
Girth, Hip - 145cm
Girth, Foot Box - 117cm
Packed Dimensions - 20cm x 26cm
EN Comfort - 11C
EN Limit - 7C
EN Extreme - -6C
Fill - eraLoft Polyester Hollow Fibre
Long
Weight - 840g
Width - 32.5"
Length - 85"
Fits - 198cm
Girth, Shoulder - 165cm
Girth, Hip - 147cm
Girth, Foot Box - 130cm
Packed Dimensions - 20cm x 26cm
EN Comfort - 11C
EN Limit - 7C
EN Extreme - -6C
Fill - eraLoft Polyester Hollow Fibre -
what we think
The Therm-A-Rest Space Cowboy 45 is an ultralight synthetic sleeping bag designed for summer and warm-weather trips where weight and packability matter most. With its streamlined design and quick-drying insulation it is well suited to short backpacking routes and minimalist overnighters.
At Valley and Peak we have used the Space Cowboy 45 for bivvy camping in the Peak District where its lightweight build and fast-drying synthetic fill proved ideal for managing dew and condensation in exposed spots. It packs down impressively small and fits easily into a compact setup alongside a bivvy bag or tarp.
Rated for summer use this bag offers enough warmth for mild nights but is best paired with extra insulation or layers if temperatures drop. The long side zip adds flexibility for venting and makes it easier to use in warmer conditions.
While it lacks the warmth of a three-season down bag the Space Cowboy 45 excels in comfort and convenience for those looking to move fast and light during the warmer months.
Overall the Therm-A-Rest Space Cowboy 45 is a great option for summer backpackers bikepackers and bivvy campers who want a lightweight synthetic bag that performs well in mild dry conditions across the UK. -
Weight
780 g
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Fill Power
eraLoft™
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Season Rating
2-Season
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Comfort Limit
7°C
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"The Valley and Peak promise is built on three pillars: thoughtfully curated gear, exceptional customer service, and a genuine love for the outdoors. As an independent, family-run business, we carefully select products from a wide variety of cottage gear brands and trusted names, ensuring that each item is rigorously tested and loved by our team. Our customer service is a cornerstone of our brand, offering personalised support to help you choose and care for your gear with confidence"
Jim De'Ath, Managing Director