Nemo Sonic Down 0° Mummy Sleeping Bag

The Sonic sleeping bag, designed for temperatures from -20°F to 40°F, combines exceptional warmth, eco-friendly materials, and innovative features like Thermo Gill™ vents and a Toester™ footbox.

Regular price $449.96
Sale price $449.96 Regular price $599.95
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Why we like this product

  • Stretch construction at the knees for comfortable side sleeping
  • Offset zipper creates a thermally efficient seal while an updated profile secures warmth closer to the body
  • Second-generation Thermo Gill™ vents extend the comfort range with a new multistage zipper system

The Nemo Sonic Down Mummy Sleeping Bag is engineered for temperatures ranging from -20°F to 40°F, this Backpacker Editors’ Choice award-winning bag combines exceptional warmth with an eco-friendly design. Featuring next-generation Thermo Gill™ vents and a multistage zipper system, the Sonic allows you to fine-tune your comfort level with ease. Its chevron baffle construction prevents down migration, ensuring consistent loft and warmth. Made from 100% recycled, bluesign® approved fabrics and filled with 800 FP hydrophobic down certified by the Responsible Down Standard, this bag reflects years of field-tested improvements, including a redesigned draft collar and an innovative Toester™ footbox that keeps your feet warm and dry. Whether you’re in the backcountry or facing unpredictable weather, the Sonic sleeping bag is your go-to gear for extreme conditions, ensuring you stay comfortable and ready for whatever adventure lies ahead.

Weight Regular - 3 lbs 4 oz
Long - 3 lbs 12 oz
Pack Size Regular 13 "x 9.5" diameter
Long 14" x 9.5" diameter 
Temperature Rating
ISO Comfort Rating 14F
ISO Limit Rating 0F
Bag Shape Mummy
Insulation Type 800-fill power
Fill Weight Regular - 1 lb 11 oz
Long - 1 lb 13 oz
Shoulder Girth Regular - 63"
Long - 65"
Hip Girth Regular - 58"
Long - 60"
Knee Girth Regular - 53"
Long - 55"
Water-Resistant No
Material 20D 100% Recycled Nylon, Bluesign Certified Ripstop w/ DWR
Manufacturer Warranty Lifetime warranty 

 

Nemo

Nemo Sonic Down 0° Mummy Sleeping Bag

$449.96
$599.95

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