This new Spark 7° sleeping bag benefits from a reworked shape to best fit the body shapes of travelers. The ergonomics of the new hood and Zips add additional comfort of use. The optimal warmth-to-weight ratio and 850+ FILL Power make this bag as comfortable as it is compact and easy to store. Goose down with Ultra Dry Down treatment for greater water resistance in humid conditions. Featuring a 10 denier nylon shell and lining, these lightweight fabrics offer breathability, protection and effective temperature regulation for optimal outdoor comfort. The waterproof and breathable characteristics of 10D nylon provide additional protection and prevent exposure to condensation from the tent walls. The Mummy Fit maximizes thermal efficiency and provides enhanced heat retention with a lightweight design for warmth, compactness and comfort in the outdoors.

Spark 7 Sea To Summit down features:

• Ttemperatures: EN13537 standard
• Comfort temperature: 11°C Temperature at which a woman can sleep comfortably.
• Comfort limit temperature: 7°C Temperature at which a man can sleep comfortably for 8 hours
• Extreme temperature: -6°C Temperature at which after 4 hours a woman will feel a sensation of cold which can lead to frostbite and/or hypothermia.

• Goose down with Ultra Dry Down treatment
  
• Ultralight materials for reduced weight and bulk
• Includes Ultra-Sil™ compression sack for compact storage
• Regular: For a person of 1.85 m maximum. Filling 150 g Bag weight: 370 g
• Long: For a person of 1.98 m maximum. Filling 172 g Bag weight: 390 g