With a 650+ fill power, this versatile, spacious, and comfortable cold weather sleeping bag has been specially designed to improve heat retention and comfort. Duck down with Ultra Dry Down treatment for improved water resistance in wet conditions. Recycled polyester provides durability and comfort for lightweight adventures in different climates and conditions. The Free Flow zipper system allows for temperature regulation and multiple configurations for greater outdoor freedom. The semi-rectangular cut offers a roomy design for comfort and space, ideal for car camping and shorter adventures. Main zipper: full-length with zipper guard and two sliders. Secondary zipper: half-length with zipper guard and two sliders. Zipper at the feet with two sliders.

Features of the Sea To Summit Trek -39°C Extreme Cold Sleeping Bag :

• Temperatures: EN13537 Standard
• Comfort temperature: -11°C Temperature at which a woman can sleep comfortably.
• Comfort limit temperature: -18°C Temperature at which a man can sleep comfortably for 8 hours
• Extreme temperature: -39°C Temperature at which, after 4 hours, a woman will feel cold and can lead to frostbite and/or hypothermia.
• Large mummy shape
  
• RDS 650+ Cuin Down
• Fill WeightRegular: 1000 g
  
• Fill WeightLong: 1163 g
• Regular Weight: 1895 g - Long Weight: 2098 g g
  
• Regular Dimensions: 198 cm for a person up to 185 cm tall
• Long Dimensions: 225 cm for a person up to 198 cm tall
• Compressed Packed: Regular 26 L - Long: 26 L