Sea to Summit's new ultralight Spark SPI sleeping bag is designed to keep you as warm as possible while minimising packed weight and size. Great for adventure when you need a high performance sleeping bag but don’t want to be weighed down by one, Sea to Summit’s Spark Series Bags are what you reach for.

The Spark I temperature rating is 9°C Comfort, 5°C Lower limit (-9°C Extreme). Regular weighs just 340g and long 385g and packs down to approx 25cm x 13cm diameter.

The Spark SPI combines ULTRA-DRY Down™ 850+ loft premium goose down, light-gauge #3 YKK® zip, high-performance 10D nylon shell and 7D lining fabrics and a contoured mummy shape for efficient insulation and superior performance.

Other features include a hybrid construction with box wall baffles over the torso for core warmth and a sewn through construction at the legs to shave weight, a half-length zip and a draft tube and a full hood to keep in your warmth. A 3-season bag ideal for mid-summer fast hikes or adventure racing.

Features:

• Contoured mummy design for efficient insulation, with updated sizing that provides extra room for shoulders and hips
• RDS 850+ Loft ULTRA-DRY Down for superior insulating power, moisture resistance and compressibility (Responsible Down Standard certified)
• 10D Nylon shell and 7D lining fabrics
• Vertical chest baffles prevent down migration and cold spots
• Horizontal sewn-through baffles in the lower half of the bag minimise weight
• Half zip with two sliders to aid access and allow ventilation from bag's mid-section
• Draft tube and draft collar prevents heat loss through the zipper and hood
• Includes storage cell and lightweight Ultra-Sil compression bag for compact storage.

NOTE: This bag is not designed to pair with another.

• Colour: Light Grey / Yellow
• Shape: Mummy
• Length: Regular or Long
• Weight: Reg 340g, Long 385g
• Circumference Dimensions: Reg chest 150cm x hip 130cm x foot 88cm, Long chest 158cm x hip 138cm x foot 94cm
• User Height: Reg up to 183cm, Long up to 198cm
• Insulation Type: RDS 850+ Loft ULTRA-DRY
  
• Temperature Ratings: 9°C Comfort, 5°C Lower limit, -9°C Extreme