SKU: 598678379

Nemo Sonic -20F/-29C Sleeping Bag

Sale price$396.00 Regular price$440.00
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Ships within 48 hours · Estimated delivery Jul 16 - Jul 21

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Description

Nemo Sonic -20F/-29C Sleeping BagThe ultimate mountain sleeping bag Built to be the only bag you need from 20F to 40F, Nemo has updated their Backpacker Editors Choice award winning big mountain bag, Sonic, for even greater warmth, tuneability, and reduced environmental impact. With this bag, we are launching our next generation Thermo Gills with a new multistage zipper system that dramatically increases the usable temperature range of the bag and allows fine tuning of comfort from

The ultimate mountain sleeping bag

Built to be the only bag you need from -20°F to 40°F, Nemo has updated their Backpacker Editors’ Choice award-winning big-mountain bag, Sonic, for even greater warmth, tuneability, and reduced environmental impact.

With this bag, we are launching our next-generation Thermo Gills™ with a new multistage zipper system that dramatically increases the usable temperature range of the bag and allows fine-tuning of comfort from within the bag. Sonic’s new chevron baffle construction better compartmentalizes down, eliminating migration and keeping the down evenly lofted. Not to mention, it looks awesome. In updating the bag's design, we put a high priority on taking a leap forward in sustainability.

The shell and liner fabrics are 100% recycled and bluesign® approved. The premium 800 FP hydrophobic down is 100% Responsible Down Standard (RDS) certified. We also took years of history in the field to make detailed upgrades, including massaging the profile of the bag, redesigning the draft collar, and bolstering the draft tubes. Our proven Toester™ footbox keeps feet warmer, provides a waterproof barrier against tent wall condensation, and protects down from moisture while drying damp clothes inside the footbox. Adaptable to whatever the mountain throws at it, Sonic continues to reverberate as the ultimate extreme weather companion.

Details

  • Award-winning design is updated for even greater warmth retention and adjustability across temperatures.
  • Updated design incorporates 100% recycled, bluesign® approved shell and liner fabrics.
  • Updated Thermo Gills™ extend the comfort range with a new multistage zipper system.
  • Overstuffed with premium 800 FP hydrophobic down that is PFC-Free and 100% Responsible Down Standard (RDS) certified, ensuring humane treatment and traceability throughout the supply chain.
  • New chevron baffle construction better compartmentalizes down for more uniform loft and down migration prevention.
  • Stretch construction at the knees for comfortable side sleeping.
  • Redesigned draft collar and draft tubes keep cold air out.
  •  Redesigned Toester™ waterproof/breathable footbox utilizes a layer of synthetic insulation to protect the down and deliver maximum toastiness for toes.
  • Offset zipper creates a thermally efficient seal while an updated profile secures warmth closer to the body.
  • Protected by the NEMO Lifetime Warranty.

 

    What's Included

    • Compression stuff sack   

      Best Use

      • Winter Camping
      • Mountaineering

      Construction & Materials

      Shell Fabric 20D 100% Recycled Nylon, Bluesign Certified Ripstop w/ DWR
      Footbox Fabric 40D 100% Recycled Nylon, Bluesign Certified Ripstop W/B w/ DWR
      Lining Fabric 20D 100% Recycled Polyester, Bluesign Certified Taffeta w/ DWR
      Color Goodnight Gray / Torch
      Zipper Location Left
      Stuff Sack Compression stuff sack
      Insulation 800 FP Down


      Specs & Sizing

      Capacity 1
      Minimum Weight 3 lb , 14 oz / 1.76 kg
      Packed Size 14.5 x 10.5 in dia / 37 x 27 cm dia
      Temp Rating -20F / -29C
      ISO Lower Limit F / C
      Fill Type Down
      Fill Weight 2 lb , 5 oz / 1.06 kg
      Fits Up To 6' / 183 cm
      Shoulder Girth 63 in / 160 cm
      Hip Girth 58 in / 147 cm
      Knee Girth 53 in / 135 cm
      Compressed Volume 12.5
      Shipping Notes
      • Free Standard Shipping on $100+ Orders to the USA.
      • Except Preorder products are shipped in 48 hours.
      • Delivery to the USA:
      1. Standard Shipping : 3-10 business days
      • If time is of the essence, please consider selecting expedited delivery for faster service.
      Exchange/Return Notes
      • We offer a 30-day return/exchange service after receiving.
      • Final sale items are not eligible for returns or exchanges.
      • To process your return/exchange, please contact us at [email protected]
      • Please click here for more details>>> Return & Exchange Policy
      SKU: 598678379

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      4.0 ★★★★★
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      Verified Purchase
      Janet Lanier
      Los Angeles, US
      ★★★★★ 4
      Wobbly but Usable
      Color: Grey, Size: Standard - 4 Panel
      A bit wobbly, but good enough for the price when you need a solid background for remote work calls.
      WAS THIS REVIEW HELPFUL?YesReportShare
      Reviewed in the United States on May 6, 2026
      L
      Verified Purchase
      Lateefah
      Houston, US
      ★★★★★ 5
      Nice and easy to assemble
      Color: Black, Size: Standard - 4 Panel
      I absolutely love this 4-panel room divider! It was super easy to assemble — I had it set up in just a few minutes. The material isn’t too see-through, which gives just the right amount of privacy while still letting some light through. It does exactly what I needed it to do and looks so clean and sleek in my space. Perfect balance of style and function — highly recommend!
      WAS THIS REVIEW HELPFUL?YesReportShare
      Reviewed in the United States on November 7, 2025
      V
      Verified Purchase
      Virginia C.
      Phoenix, US
      ★★★★★ 5
      A quick private space
      Color: Black, Size: Standard - 4 Panel
      Went together easily, just the right height and width for just a bit of privacy.
      WAS THIS REVIEW HELPFUL?YesReportShare
      Reviewed in the United States on March 3, 2026
      P
      Verified Purchase
      Pat Smith
      Omaha, US
      ★★★★★ 5
      Excellent quality, excellent privacy.
      Color: White, Size: 4 Panel
      I love this room divider! Was easy to put together. It's easy to move around. I also bought the eight panel. I move it and change it around all the time. Good color good material good privacy.
      WAS THIS REVIEW HELPFUL?YesReportShare
      Reviewed in the United States on May 12, 2026
      S
      Verified Purchase
      Skylar Hartnett
      Grantham, US
      ★★★★★ 5
      It works to divide a room, but it's not easy to use.
      Color: Grey, Size: 6 Panel
      This comes in multiple pieces and you have to build every single piece including the cloth that is between the two poles. There are plastic clips to hold the sections together, but they easily come off if you move the dividers the wrong way or try to reposition it. The only thing holding it up is rectangular shaped feet on the bottom and they are a pain when you hit it with your toes. It works if you need to divide a room, but its not pretty and there are far better options. It's cheaply made and has a habit of falling down if you are trying to use it in a straight or slightly angled line.
      WAS THIS REVIEW HELPFUL?YesReportShare
      Reviewed in the United States on December 26, 2022

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