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❄️ Elevate your mountain nights with warmth, style, and sustainability — the Sonic way!
The NEMO Equipment Sonic Down Mummy Sleeping Bag is an award-winning, eco-conscious winter sleeping bag designed for extreme temperatures from -20°F to 40°F. Featuring 100% recycled, bluesign approved nylon fabrics and premium 800 FP hydrophobic down certified by the Responsible Down Standard, it offers superior warmth retention with chevron baffle construction to prevent down migration. Its next-generation Thermo Gill vents and multistage zipper system provide unparalleled temperature control, while the Toester footbox ensures dry, warm feet. Backed by a lifetime warranty, Sonic is the ultimate choice for professional adventurers seeking performance, sustainability, and comfort.










| ASIN | B09RN9L16W |
| Additional Features | Next-generation Thermo Gills, Chevron baffle construction, Updated profile, Stretch construction at the knees, Draft collar and draft tubes, Toester waterproof/breathable footbox |
| Age Range Description | Adult |
| Best Sellers Rank | #508,559 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #877 in Camping Sleeping Bags |
| Brand Name | Nemo |
| Closure Type | Zipper |
| Color | Goodnight Gray / Torch |
| Customer Reviews | 4.2 4.2 out of 5 stars (13) |
| Fabric Type | Nylon |
| Fill Material Type | Down |
| Item Dimensions L x W | 77.95"L x 31.5"W |
| Item Weight | 1.76 Kilograms |
| Manufacturer | Nemo Equipment |
| Manufacturer Part Number | 811666034540 |
| Material | Nylon |
| Maximum Height Recommendation | 72 Inches |
| Model Number | NM-SNC3-R |
| Occupancy | 1 Person |
| Seasons | Winter |
| Shape | Mummy |
| ShellMaterial | Polycarbonate |
| Size | Standard |
| Sport Type | Camping |
| Temperature Rating | Extreme |
| UPC | 811666034540 |
| Warranty Description | Every NEMO Product is backed by a lifetime warranty against defects in workmanship and materials. |
I**R
worth the money
Nice and toasty, just a great design.
R**S
zipper problems
Nice and warm at +23 degrees F and windy. The zipper was sticky and jammed the first trip. Brought it home and unstuck it with great force. The next trip I had the same zipper issues so I had to return it. Too bad, it's a really nice bag with plenty of room for me.
C**N
Very comfortable
So comfortable and such high quality. Kept warm in a cabin in November!
J**.
Top-of-the-line sleeping bag
I am an avid outdoorsman. I really like this sleeping bag Haven’t been below 5° yet but done well at 5° And above I stay Toasty. I’m 6 foot tall 195 pounds and there’s plenty of room for a comfortable nights Sleep
Trustpilot
2 months ago
2 months ago