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Kelty’s got your back during your next chilly night in the backcountry. With the Sine 20° DriDown™ Sleeping Bag, you get the best of both worlds of comfort and light on weight. The Arc Zipper System is there to provide a natural arm motion when opening the bag and for dual venting. The water-resistant 800 fill DriDown™ stays drier, lofts better, and dries faster. On warmer nights, leave unzipped and use like a blanket. 


  • 800 fill power DriDown™
  • Arc Zipper System
  • Built-in pillow pocket
  • Thermal-comfort hood
  • Natural fit toebox
  • Zipper draft tube with anti-snag design
  • Draft Collar
  • Mesh storage sack included
  • Stuff sack included


Temp Rating: 20° / -7°C

EN Lower Limit Rating: 19° F / -7° C

Size Regular:
  • Fits to: 6 ft / 183 cm                                   
  • Fill weight: 14.6 oz / .414 kg
  • Total weight: 2 lbs 5 oz / 1.041 kg
  • Stuffed size: 8 x 14 in / 20 x 36 cm

Size Long:
  • Fits to: 6 ft 6 in / 198 cm
  • Fill weight: 17 oz / .483 kg
  • Total weight: 2 lbs 9 oz / 1.157 kg
  • Stuffed size: 8 x 14 in / 20 x 36 cm


800 fill power DriDown™

Shell material:
20D Nylon Ripstop

Liner material:
20D Nylon Taffeta

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Gender: Unisex
Insulation: DriDown
Temperature Rating: 20 Degree
Mountain Sports:
  • Features

  • Specifications

  • Kelty Sine DriDown Sleeping Bag

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Product ReviewsWe Love to Hear your Feedback


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  1. sine 20

    nice compact lightweight back packing bag, great access zippers. especially like that I can leave my feet out. The stash sack was in the foot of the bag, love having a stash and mesh bag! on Jul 5th 2018

  2. Great sack

    I like the dual diagonal zipper, although I am a little nervous about ripping the foot one open in my sleep. on Apr 5th 2018

  3. Great Design

    Everything is great about this sleeping bag. Its light, zipper features are great, and comfortable inside. Only thing I would suggest for the future is to beef up the exterior denier. on Aug 23rd 2017

  4. Soft Bag

    I love this bag! Very soft and comfortable and I really like the dual zipper design to regulate temperature. Compresses well and like all Kelty bags the EN rating is spot on. I think it's the perfect combination of weight, function and price. I think that a 1 star review like the one above is not indicative of the quality and function of this bag it's more of a preference opinion. I would recommend this bag highly! on Jul 19th 2017

  5. Great new addition

    This bag is very comfortable, good soft material and I really like the dual zippers to regulate temperatures. Like all Kelty bags the EN rating is spot on. It compresses well and takes up minimal space in my Redwing 50. I highly recommend this bag if you are looking for a decent price bag that is lightweight and full featured. on Jul 19th 2017

  6. Not a big fan

    I ordered this sleeping bag since it has two zippers and thought that would keep me cool during the spring and summer. However, the mid section to this bag constrained me since that part doesn't open. I would prefer the classic zipper on one side and I plan on buying a new bag and giving this one away. on Jun 22nd 2017

  7. Very soft! Great foot zipper!

    This bag is soft and cozy. It packs down without much effort and lofts again very quickly. The natural arc zipper doesn't make much difference to me as I sleep in a somewhat confining bivy. However, I have really enjoyed pulling my feet out and on top of the bag with the lower zipper when the night gets too warm. The bag has never gotten wet on the inside despite moisture and condensation, and the outside dries off extremely fast when draped over a bush in the sun. The compression sack that comes with the bag is perfect.

    Suggestions for Kelty: I would have preferred a right hand zipper, a waterproof toebox, and added inches to the shoulder and hip girth.
    on Apr 19th 2017

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