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ThermARest Space Cowboy™ 45F/7C Sleeping Bag

Availability: In stock (1)

The feather-weight Space Cowboy is built with eraLoft™ synthetic insulation to endure the rigors of backpacking and cowboy camping in variable conditions.

Designed with innovative Therm-a-Rest features like SynergyLink™ Connectors and Zoned Insulation, the bag is among the lightest and most packable in its class.

The mummy-style bag compresses down to take up minimal room in your pack and comes in two outdoor-inspired colors.

Whether exploring the western frontier, bike packing through the desert or wandering through the wild, the Space Cowboy has you covered.

Storage sack and compression stuff sack included.

eraLoft™ Insulation: Efficient and compressible, our water-resistant synthetic fill uses hollow fibers to reduce weight without sacrificing warmth.
SynergyLink Connectors ™ Connectors: Integrate the bag with a mattress for optimal comfort and efficiency; removable for versatility.
Zoned Insulation: Maximizes warmth and saves weight by intentionally placing fill where you need it most. Placing 65% of the fill on top and 35% on the bottom keeps the Space Cowboy lightweight without sacrificing warmth.
Quilt and Blanket Loops: Customize your sleep system by layering our quilts or tech blankets for increased warmth.
Additional features: Snag-free zipper and cinchable hood.


  Small Regular Long
SKU 10278, 10288 10279, 10289 10280, 10290
Color Galactic, Ether Galactic, Ether Galactic, Ether
Weight (Standard) 1 lbs 2 oz 1 lbs 4 oz 1 lbs 6 oz
Weight (Metric) 0.50 kg 0.57 kg 0.62 kg
Width (Standard) 28 in 31.5 in 32 in
Length (Standard) 73 in 80 in 85 in
Height (Standard) 3.5 in 3.5 in 3.5 in
Fits (Standard) 66 in 72 in 78 in
Fits (Metric) 168 cm 183 cm 198 cm
Girth, Shoulder (Standard) 56.5 in 61.5 in 64.5 in
Girth, Shoulder (Metric) 144 cm 156 cm 164 cm
Girth, Hip (Standard) 56.5 in 58 in 58.5 in
Girth, Hip (Metric) 144 cm 147 cm 149 cm
Girth, Foot box (Standard) 42.5 in 44.5 in 49.5 in
Girth, Foot box (Metric) 108 cm 113 cm 126 cm
Packed dimension (Standard) 7 in x 10 in 7 in x 10 in 7 in x 10 in
Packed dimension (Metric) 18 cm x 25 cm 18 cm x 25 cm 18 cm x 25 cm
EN Comfort (C) 11 C 11 C 11 C
EN Comfort (F) 52 F 52 F 52 F
EN Limit (C) 7 C 7 C 7 C
EN Limit (F) 45 F 45 F 45 F
EN Extreme (F) 21 F 21 F 21 F
EN Extreme (C) -6 C -6 C -6 C
Fill material eraLoft 120g 3D Hollow Polyester Fiber eraLoft 120g 3D Hollow Polyester Fiber eraLoft 120g 3D Hollow Polyester Fiber
Fill weight (Standard) 7.9 oz 8.8 oz 9.5 oz
Fill weight (Metric) 0.22 kg 0.25 kg 0.27 kg
Shell fabric 20D Polyester Ripstop w/DWR 20D Polyester Ripstop w/DWR 20D Polyester Ripstop w/DWR
Lining fabric 20D Polyester Taffeta 20D Polyester Taffeta 20D Polyester Taffeta
Zipper side Left Left Left
Country of Origin China China China
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