The Therm-a-Rest Space Cowboy 45°F / 7°C Long Sleeping Bag is an ultralight, highly compressible synthetic mummy bag designed for fast-and-light summer backpacking, bike-packing, and "cowboy camping" under the stars. The Long configuration is tailored to fit taller campers up to 6 feet 6 inches (198 cm) while keeping excess weight to an absolute minimum.

Unique Performance Highlights

• eraLoft™ Synthetic Fill: Insulated with specialized hollow-fiber polyester that traps air efficiently to boost warmth without adding bulk. It dries remarkably fast and continues to insulate even if exposed to heavy morning dew, high trail humidity, or tent floor condensation.
• Zoned Insulation & ThermaCapture™: Delivers an optimized warmth-to-weight ratio by placing 65% of the insulation on the top of the bag to trap rising heat, and only 35% on the bottom. It features a reflective ThermaCapture lining on the upper side to bounce your radiating body heat back to you.
• SynergyLink™ Connectors: Includes lightweight, removable elastic straps on the underside that securely lock your sleeping bag to your sleeping mat. This prevents you from sliding or rolling off your pad during the night.
• Blanket Loops: Features integrated fabric loops that allow you to seamlessly snap a Therm-a-Rest quilt or tech blanket over the top, making it easy to layer and extend the bag's temperature range into cooler spring or autumn seasons.

Specifications at a Glance

• Temperature Rating: 45°F / 7°C ISO Lower Limit. (The ISO Comfort rating for cold sleepers is optimized for 52°F / 11°C, making it strictly a warm-weather summer bag).
• Sizing & Fit (Long): Fits users up to 6'6" (198 cm). It utilizes a classic mummy profile but with a slightly relaxed, performance-tuned cut for added wiggle room.
• Weight: Feather-light at just 1 lb 5 oz to 1 lb 6 oz (approx. 600–625 grams).
• Packed Size: Compresses down to roughly 7 x 10 inches (18 x 25 cm) inside the included compression stuff sack.
• Materials: Light and soft 20D ripstop shell and lining crafted from 100% GRS-certified recycled nylon and outfitted with a smooth YKK anti-snag zipper slider.

This sleeping bag combines lightweight performance with durable, water-resistant insulation, making it a reliable companion for your summer adventures.