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Kelty’s got your back during your next chilly night in the backcountry. With the Sine 35° 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. Including the water-resistant 800 fill DriDown™ stays drier, lofts better, and dries faster. Part of the Built for Women collection, this Sine sleeping bag has added down for added warmth. On warmer nights, leave unzipped and use like a blanket. No more bags under the eyes while using the Kelty Built Sine Sleeping Bag on your next adventure!  


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


Temp Rating: 35° / 2°C

EN Lower Limit Rating: 29° F / -2° C

Size Regular:
  • Fits to: 6 ft / 183 cm                                   
  • Fill weight: 9 oz / .255 kg
  • Total weight: 1 lb 14 oz / .839 kg
  • Stuffed size: 7 x 14 in / 18 x 36 cm

Size Long:
  • Fits to: 6 ft 6 in / 198 cm
  • Fill weight: 11 oz / .312 kg
  • Total weight: 2 lbs 1 oz / .934 kg
  • Stuffed size: 7 x 14 in / 18 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: 35 Degree
  • Features

  • Specifications

  • Kelty Sine DriDown Sleeping Bag

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Product ReviewsWe Love to Hear your Feedback


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  1. Good, Innovative Bag

    The only reason why I am giving this bag 4 stars instead of 5 is because I am not yet used to the new cross-body zipper design. It definitely takes some getting used to and I did get kind of tangled up at first. However, the lower foot zipper is great. Exactly what you need for maximum comfort.

    Everything else about it is great - it is the perfect weight for summer/fall camping. The bag is very high quality. It compresses very small and packs away nicely. I would recommend this to anyone.
    on Aug 11th 2017

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