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Sea to Summit Spark SpIII Ultralight Down Sleeping Bag 18°F / -8°C - Regular
Ultra-light and technical, our Spark™ Series bags are designed to keep you as warm as possible while minimizing packed weight and size.
The Spark™ Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible. The secret to the impressive performance is a combination of premium materials and careful design. The RDS 850+ Loft premium goose down, light-gauge #3 Ykk zip and high performance 10D Nylon shell and 7D lining fabrics, set the stage for superior performance. These materials are combined with a contoured mummy design for efficient insulation, and that mummy design is then tweaked for each model to best fit the use scenario.
Features
• Ultralight 7D and 10D fabrics for minimal weight and packed size
• RDS 850+ Loft Premium Goose Ultra-Dry Down™ for maximum insulation value
• Contoured mummy shape for comfort and efficient insulation
• Vertical chest baffles prevent down migration and cold spots
• Note: This bag is not designed to zip with another
• Uses a full box baffle construction to accommodate extra down and reduce cold spots
• Expedition mummy bag sizing provides extra space for layered clothing or extra wriggle room
• Vertical baffles in chest optimize position of down to prevent it moving during use
• Full side zip with two sliders provides easy access and extra ventilation options
• Zipper draft tube, hood and front neck draft collar to prevent warmth being lost when it’s needed
Specifications
• Max user height: < 183cm/6'
• Fill weight: 15oz/430g
• Weight: 1lb 6oz/618g
• 2.5 Season
Temperature
• Comfort: 29°F/-2°C
• Lower limit: 18°F/-8°C
• Extreme: -15°F/-26°C
Girth
• Shoulder: 155cm(61“)
• Hip: 135cm(53“)
• Foot: 94cm(37“)….
Ultra-light and technical, our Spark™ Series bags are designed to keep you as warm as possible while minimizing packed weight and size.
The Spark™ Series spans everything from an ultralight liner to an expedition weight mid-winter bag. While the end usage is very different, they reflect a design ethos of matching weather conditions to the lightest bag possible. The secret to the impressive performance is a combination of premium materials and careful design. The RDS 850+ Loft premium goose down, light-gauge #3 Ykk zip and high performance 10D Nylon shell and 7D lining fabrics, set the stage for superior performance. These materials are combined with a contoured mummy design for efficient insulation, and that mummy design is then tweaked for each model to best fit the use scenario.
Features
• Ultralight 7D and 10D fabrics for minimal weight and packed size
• RDS 850+ Loft Premium Goose Ultra-Dry Down™ for maximum insulation value
• Contoured mummy shape for comfort and efficient insulation
• Vertical chest baffles prevent down migration and cold spots
• Note: This bag is not designed to zip with another
• Uses a full box baffle construction to accommodate extra down and reduce cold spots
• Expedition mummy bag sizing provides extra space for layered clothing or extra wriggle room
• Vertical baffles in chest optimize position of down to prevent it moving during use
• Full side zip with two sliders provides easy access and extra ventilation options
• Zipper draft tube, hood and front neck draft collar to prevent warmth being lost when it’s needed
Specifications
• Max user height: < 183cm/6'
• Fill weight: 15oz/430g
• Weight: 1lb 6oz/618g
• 2.5 Season
Temperature
• Comfort: 29°F/-2°C
• Lower limit: 18°F/-8°C
• Extreme: -15°F/-26°C
Girth
• Shoulder: 155cm(61“)
• Hip: 135cm(53“)
• Foot: 94cm(37“)….