A warm-weather backpacking sleeping bag that won't bully your pack for space is a genuinely useful piece of kit for summer trips, and the Therm-a-Rest Space Cowboy 45°F/7°C delivers on that premise without cutting corners on performance.

The fill is eraLoft synthetic insulation, a hollow-fibre fill that resists moisture, dries quickly, and compresses down well for a mummy-style bag rated for warmer conditions. Zoned Insulation places 65% of the fill on top where your body loses the most heat and 35% underneath, trimming weight without creating cold spots. SynergyLink Connectors anchor the bag to your sleeping pad for a sleep system that stays together when you shift positions through the night, and they're fully removable when you'd rather use the bag on its own.

Quilt and blanket loops give you the option to layer additional Therm-a-Rest pieces over top when the temperature drops unexpectedly, adding flexibility across a wider range of conditions. A cinchable hood and snag-free zipper round out the feature set. It compresses down small and comes in two colours that lean toward the outdoors-inspired end of the spectrum.

• Temperature rating: 45°F/7°C
• Insulation: eraLoft synthetic hollow-fibre (water-resistant)
• Zoned Insulation: 65% fill on top, 35% on bottom
• Style: Mummy with cinchable hood
• SynergyLink Connectors for pad integration (removable)
• Quilt and blanket loops for system layering
• Snag-free zipper
• Includes compression stuff sack and storage sack