Nemo Sonic -18C Sleeping Bag - Unisex 6007-630

Nemo Sonic -18C Sleeping Bag - Unisex

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Show Description

Nemo’s award-winning Sonic is updated to make a good bag better, with a few extra features to ensure you get a great night’s sleep. A redesigned collar and hood seal out cold and retain warmth where you need it. Stretch stitching at the knees maximizes internal volume and make side-sleeping easier in this form-fitting mummy bag. Thermo Gills™ allow you to dial-in the perfect temperature when you're warm, but the air outside is too cold to unzip – like cracking a widow. Overstuffed with 800 fill-power hydrophobic down to offer serious warmth in serious weather.

  • Shell is ripstop nylon with soft nylon taffeta lining, both treated with a DWR finish.
  • Zippered Thermo Gills let you release extra body heat without letting cold air in.
  • 800 fill-power Nikwax Hydrophobic Down™ wont wet-out, staying lofty and warm in all conditions.
  • Horizontal and vertical baffles channel warmth along your body, reducing cold sports.
  • Hood provides a warmer, closer fit, keeping your noggin warm on cold nights.
  • Internal draft collar helps seal in the heat.
  • Stretch stitching at the knees helps maintain shape while increasing thermal efficiency and optimizing volume in the bag.
  • Toester™ waterproof breathable footbox has a DWR finish.
  • On-seam zippered pockets for small necessities.
  • Included compression sack and cotton home storage sack.
  • Covered by Nemo’s lifetime warranty.


Tech specs

Show Tech specs
  • 1.36kg (Regular)
  • 1.41kg (Long)
  • 1.29kg (Short)
Ideal for
  • Backpacking
  • Winter and expedition camping
  • Regular fits to 6' 0" (183 cm) (Regular)
  • Long fits to 6' 6" (198 cm) (Long)
  • Small fits to 5' 6" (168 cm) (Short)

The number of average sized people that the product can comfortably sleep.

Temperature -18°C
Shape Mummy
EN Limit Temperature Rating

This sleeping bag has been tested to the EN standard in a certified lab. This controlled test measures thermal value using a heated mannequin (wearing a base layer and a hat) placed on a 1-inch pad. The Limit Rating is the lowest temperature at the average man (or "warm sleeper) can sleep in a curled body position for 8 hours without feeling cold.

Insulation 800 fill-power water-repellent goose down
Down weight

The amount of down used to fill the product (measured in grams and given for size medium bags).

  • 720g (Regular)
  • 760g (Long)
  • 700g (Short)
Technology Nikwax Hydrophobic Down
Construction Baffle
Face fabric 20-denier ripstop nylon
Lining/backer 30-denier nylon
Packed volume

The size of the bag when compressed using ASTM standard. This measurement is not available for all brands.

  • 7.7L (Regular)
  • 8.03L (Long)
  • 7.19L (Short)
Recommended Compression Sack 12L
Packed size
  • 39 x 20cm (Regular)
  • 41 x 22cm (Long)
  • 38 x 20cm (Short)
Shoulder girth
  • 155cm (Regular)
  • 175cm (Long)
  • 147cm (Short)
Hip girth
  • 147cm (Regular)
  • 160cm (Long)
  • 142cm (Short)
Foot girth
  • 135cm (Regular)
  • 142cm (Long)
  • 132cm (Short)

An insulated collar that covers yours neck and shoulders to reduce heat loss.

Additional feature(s)
  • DWR-treated shell fabric
  • Stash pocket
  • Draft tube behind zipper
  • Home storage sack included
  • Stuff sack included
Product sustainability Certified Responsible Down
Made in China