Sonic Down Mummy Sleeping Bag -18°C

Sonic Down Mummy Sleeping Bag -18°C

NEM SONIC 0 SBAG W22 short regular long
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Lifetime Club Membership $10.00
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This Backpacker Editors’ Choice award-winning big-mountain bag offers exceptional warmth and tuneability with a reduced environmental impact. The bag features Nemo's next-generation Thermo Gill™ vents, with a new multistage zipper system that dramatically increases the usable temperature range of the bag and allows fine-tuning of comfort from within. Sonic’s chevron baffle construction better compartmentalises down, eliminating migration and keeping the down evenly lofted. (Not to mention, it looks awesome.)

The shell and liner fabrics are 100% recycled fabrics and bluesign® approved, and the premium 800 FP hydrophobic down is 100% Responsible Down Standard (RDS) certified. Years of history in the field yielded detailed upgrades on this bag, including a perfected profile, redesigned draft collar, and bolstered draft tubes. Nemo's 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.


  • 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 compartmentalises 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 utilises 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




  • Minimum Weight: 1.42kg (short); 1.47kg (reg); 1.62kg (long)
  • Packed Weight: 1.48kg (short); 1.53kg (reg); 1.7kg (long)
  • Fill Weight: 770g (short); 790g (reg); 835g (long)

Temperature Rating: ISO Comfort: -10°C, ISO Limit: -18°C


  • Shell Fabric: 20D 100% Recycled Nylon, Bluesign Certified Ripstop w/ DWR
  • Footbox Fabric: 100% Recycled Nylon, Bluesign Certified
  • Lining Fabric: 20D 100% Recycled Polyester, Bluesign Approved Taffeta w/ DWR
  • Insulation: 800 FP Hydrophobic Down, PFC-Free, RDS-Certified


  • Fits Up To: 168cm (short); 183cm (reg); 198cm (long)
  • Shoulder Girth: 155cm (short); 160cm (reg); 165cm (long)
  • Hip Girth: 142cm (short); 147cm (reg); 153cm (long)
  • Knee Girth: 130cm (short); 135cm (reg); 140cm (long)

Packed Size: 33 x 24 cm dia (short); 34 x 24 cm dia (reg); 36 x 24 cm dia (long)

Compressed Volume: 8.9L (short); 9.6L (reg); 9.9L (long)

Zipper Side: Left

Comes With: Compression sack

Colour: Goodnight Gray/Goldfinch

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    Free standard shipping Australia wide on all orders over $99!
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    Paddy Pallin is proud to stand behind the products we sell. Should you change your mind, you are welcome to return goods for a refund or exchange within 90 days from receipt of goods. Goods must be accompanied by proof of purchase, be in original purchase condition and include packaging. No returns on underpants, safety, face masks or climbing gear.

    You are able to return your online orders in store or by posting the items back to us. For more information, including the Online Returns Form, please see our Returns Page

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    *Applies to ranged stock only. Not applicable to gift cards, services such as repairs, and Oxfam Trailwalker merchandise. Discount may not be used in conjunction with any other offer.

    Lifetime Club Membership

    Join the Paddy Pallin Club for $10.00 and receive a 10% discount on all future purchases.*


    Exclusive Club Member sales, promotions, and events!
    *Club Member discount not applicable to gift cards and services such as repairs. Discount may not be used in conjuction with any offer