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Mammut Sphere L Down 3-Season

2 reviews   |  

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The Mammut Sphere L Down 3-Season is a full length high performance, lightweight down sleeping bag with one of the lowest pack volumes available. 

Made from extremely lightweight materials and with 500g of 800 cuin top quality European goose down, the Mammut Sphere Down 3-Season is a contender for being one of the lightest sleeping bags with the lowest pack volume on the market. The outer fabric is windproof and water repellent, whilst the wave-shaped chambers prevent the down from migrating. The two-layer 9-chamber construction and ergonomically designed foot areas in the winter versions and this 3-season model ensure increased comfort, insulation and extra warmth for your feet, and a 140 cm long zipper, makes getting in and out a breeze. This generous bag will suit taller people looking for a performance 3-season sleeping bag. Flask not included.

More Help? For further assistance on choosing your down sleeping bag, we have an article explaining fill power, the pros and cons of down over synthetic insulation and more info on caring for your bag available to view here: Down Sleeping Bags.


  • The prolightTX™ outer fabric is as light as a feather, windproof and water-repellent
  • Wave-shaped chambers prevent down slipping of the down and prevent cold bridges
  • Performance Hood with Advanced Visibility: a full view with the hood closed and very good protection against the cold
  • Enhanced comfort and insulation in foot area
  • Two-layer 9-chamber construction in winter and 3-season models ensures extra warmth in foot area
  • Revised zipper reduces risk of jamming
  • Contains textile products of animal origin (down or leather)
  • Includes compression sac and storage bag 


  • Maximum body size: 195 cm
  • Inner bag length: 210 cm
  • Inner width in foot area: 50 cm
  • Construction type: Wave-shaped chambers prevent down slippage
  • Comfort temperature: -1 °C
  • Comfort temperature limit: -7 °C
  • Extreme Temperature Limit : -24 °C
  • Maximum inner width: 78 cm 
  • Insulated collar: No
  • Main Fabric: prolightTX™ - 100% Polyamide 
  • Filling: 500g of White European goose down 
  • Fill power 800 cuin
Weight: 850g

    Free Mura Chalk 300g

    With every Rock + Run Blockbuster Chalk Bag purchased.

    Customer Reviews
    5.0 Based on 2 reviews
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    Filter Reviews:
      Oleksandr K.
      Mammut Sphere Down 3-Season (Long)

      Ich bin höchstzufrieden! Alles prima! Zu so einem Preis, so einen tollen Schlafsack zu bekommen ist nirgendwo möglich!

      Simone B.
      Super Produkte, super Preise, schnelle Lieferung

      Alles bestens, so wie erwartet. Werde auf jeden Fall wieder bestellen!