The Solar Ultra 1 in one sentence: a blend of new innovations for your comfort. This Sleeping bag - 0 from Rab is extremely lightweight and will accompany you during your summer low mountain adventures. Its accordion design ensures optimal heat retention so that even in cool weather, you stay warm! Material: 100% recycled polyester Lining: 100% recycled polyester Rab Sleep Limit: -4°C (25°F) ISO EN Temperature Rating: Comfort: 6°C (45°F), Limit: 1°C (35°F), Extreme: -14°C (5°F) Recycled Atmos™ 20D ripstop nylon fabric (38 g/m²) with fluorocarbon-free DWR Lining: Recycled Atmos™ 20D ripstop polyester fabric (41 g/m²) with fluorocarbon-free DWR Skrim: 100% polyester canvas with aluminum coating (15 g/m²) Upper: Recycled synthetic Stratus insulation in a three-layer construction (100% recycled polyester 100 g/m²/100 g/m²/40 g/m²) Base: Recycled synthetic Stratus insulation in a double-layer blanket construction (100% recycled polyester 40 g/m²/40 g/m²) Internal TILT Scrim technology on the upper to reduce radiant heat loss Triple-layer accordion blanket construction on the upper for improved loft and warmth Elasticated internal quilting to draw insulation towards the user and eliminate cold spots Offset localized quilting to reduce cold transmission Low-volume hood for better heat retention Adjustable and contoured neck baffle design to reduce heat loss YKK 3/4 length main zip with synthetic insulated zip baffle to trap heat YKK anti-snag zipper insert and internal anti-snag zipper guard Compression sack included Tapered mummy shape Weight: 880 g Rab Solar Ultra 1 - Sleeping bag - 0