The Spero’s trim, performance shape and shingle-style construction offer maximum warmth in a minimal package for extended time on the trail. In Regular, Long and Women's. Women's model has unique dimensions and insulation levels tailored for optimal women's fit and performance requirements.

• Shingle-style construction provides the perfect balance of comfort and performance
• Comfortable, warm-to-touch peached polyester lining fabric
• Locking, 2-way zipper allows adjustments for ventilation
• Full-length, insulated zipper draft tube with anti-snag guard defends against cold air intrusion
• Mates with regular length (right side zipper) mummy style sleeping bags
• Anatomic hood design
• Insulated hood and chin baffles seal in warmth
• Internal pocket
• Compression stuff sack
• Eureka! Synthesis technical insulation is Eureka’s lightest, most-compressible, and resilient insulation. The proprietary blend of synthetic fibers is engineered to optimize thermal performance in an ultra-soft, easy to pack, and durable sleeping bag fit for any adventure
• Shape: Mummy
• Temperature rating: 30 °F / -1 °C
• Minimum Weight: 2 lbs 9 oz
• Insulation: Synthetic
• Insulation Type: Eureka! Synthesis
• Insulation Weight: 1 lbs 8 oz
• Stuff Sack Size: 8 in x 15.5 in
• Construction: Shingled
• Fits To: 6 ft 6 in
• Size: 84 in x 33 in