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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 | 0° |
| 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 |
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