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  • Ultralight four-season bag that doesn’t sacrifice comfort

    This ultralight, mummy-style sleeping bag prioritises high performance without skimping on comfort. The generous cut provides more room to move around, so you won’t feel constricted, without sacrificing warmth thanks to compact baffles stuffed with premium, eco-friendly moisture-resistant down. A draught collar and adjustable hood offer reliable warmth, even in seriously sub-zero temperatures. This ensures the bag is suitable for the coldest winter conditions. And if you do get a little too toasty, a cleverly designed hands-free foot vent allows you to simply raise your knee and stick your toes out of the bottom of the bag for instant cooling

      • PFC-Free 800FP Dridown and 15d nylon fabrics / ultralight weight
      • Patented Self Sealing foot vent / fast and easy ventilation
      • Draft-dodger collar / helps prevent drafts
      • 5" baffle spacing and side wall baffles / helps to keep down from shifting keeping you warmer
      • Anti-snag zipper tracks / makes getting in and out easy
    • Regular Long
      Fill Weight 736 g 820 g
      Minimum Weight 1.14 kg 1.23 kg
      Fits up to 183 cm 198 cm
      Length 198 cm 213 cm
      Shoulder Circumference 157 cm 163 cm
      Hip Circumference 142 cm 147 cm
      Footbox Circumference 102 cm 107 cm
      Mesh Storage Bag Size 51 x 31 cm 51 x 31 cm
      Stuff Sack Size 41 x 23 cm 41 x 23 cm
      • Insulation: 800FP PFC-Free DriDown
      • Shell Fabric: 15d nylon risptop
      • Liner Fabric: 15d nylon risptop
      • Sustainability through Longevity: Lifetime warranty from Sierra Designs
    • Maybe it’s no wonder that the state of California has been the cradle for so many great American outdoor brands. Sandwiched between the Pacific Ocean and the Sierra Nevada mountains, and encompassing no less than nine US National Parks, the Golden State has long been a mecca for outdoor adventurers of every ilk. Sierra Designs is a case in point. California was the natural place for the brand’s co-founders, a pair of young outdoor aficionados named George Marks and Bob Swanson, to set up shop.

      They first met in late 1963 at while working at The Ski Hut in Berkeley, CA. Two years later, Sierra Designs was born. Today, the brand continues to create outdoor equipment and apparel that is functional, beautiful, and most importantly, attainable, enabling outdoor lovers throughout the USA and beyond to hit the trail and fill their souls with a sense of wanderlust.

    Nitro 800F 0°F Sleeping Bag



    Size:
    Colour: Grey/Yellow/Peat
    Grey/Yellow/Peat
    Free UK Shipping On Orders £50+
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    Platinum Trusted Service Award 2025

    Ultralight four-season bag that doesn’t sacrifice comfort

    This ultralight, mummy-style sleeping bag prioritises high performance without skimping on comfort. The generous cut provides more room to move around, so you won’t feel constricted, without sacrificing warmth thanks to compact baffles stuffed with premium, eco-friendly moisture-resistant down. A draught collar and adjustable hood offer reliable warmth, even in seriously sub-zero temperatures. This ensures the bag is suitable for the coldest winter conditions. And if you do get a little too toasty, a cleverly designed hands-free foot vent allows you to simply raise your knee and stick your toes out of the bottom of the bag for instant cooling

      • PFC-Free 800FP Dridown and 15d nylon fabrics / ultralight weight
      • Patented Self Sealing foot vent / fast and easy ventilation
      • Draft-dodger collar / helps prevent drafts
      • 5" baffle spacing and side wall baffles / helps to keep down from shifting keeping you warmer
      • Anti-snag zipper tracks / makes getting in and out easy
    • Regular Long
      Fill Weight 736 g 820 g
      Minimum Weight 1.14 kg 1.23 kg
      Fits up to 183 cm 198 cm
      Length 198 cm 213 cm
      Shoulder Circumference 157 cm 163 cm
      Hip Circumference 142 cm 147 cm
      Footbox Circumference 102 cm 107 cm
      Mesh Storage Bag Size 51 x 31 cm 51 x 31 cm
      Stuff Sack Size 41 x 23 cm 41 x 23 cm
      • Insulation: 800FP PFC-Free DriDown
      • Shell Fabric: 15d nylon risptop
      • Liner Fabric: 15d nylon risptop
      • Sustainability through Longevity: Lifetime warranty from Sierra Designs
    • Maybe it’s no wonder that the state of California has been the cradle for so many great American outdoor brands. Sandwiched between the Pacific Ocean and the Sierra Nevada mountains, and encompassing no less than nine US National Parks, the Golden State has long been a mecca for outdoor adventurers of every ilk. Sierra Designs is a case in point. California was the natural place for the brand’s co-founders, a pair of young outdoor aficionados named George Marks and Bob Swanson, to set up shop.

      They first met in late 1963 at while working at The Ski Hut in Berkeley, CA. Two years later, Sierra Designs was born. Today, the brand continues to create outdoor equipment and apparel that is functional, beautiful, and most importantly, attainable, enabling outdoor lovers throughout the USA and beyond to hit the trail and fill their souls with a sense of wanderlust.

    Every feature was well designed and worked as advertised. I

    -Jon M, Verified Buyer

    Sierra Designs

    Nitro 800F 0°F Sleeping Bag

    Size: Regular
    Colour: Grey/Yellow/Peat
    + -1
    Colour Grey/Yellow/Peat
    Grey/Yellow/Peat