---
product_id: 494467324
title: "Sonic Down Mummy Sleeping Bag"
brand: "nemo"
price: "HK$7827"
currency: HKD
in_stock: true
reviews_count: 4
category: "Nemo"
url: https://www.desertcart.hk/products/494467324-sonic-down-mummy-sleeping-bag
store_origin: HK
region: Hong Kong
---

# 800 FP hydrophobic down – premium warmth 100% recycled bluesign approved shell & liner Thermo Gill vents – multistage temp control Sonic Down Mummy Sleeping Bag

**Brand:** nemo
**Price:** HK$7827
**Availability:** ✅ In Stock

## Summary

> ❄️ Stay warm, stay green, stay legendary on every adventure!

## Quick Answers

- **What is this?** Sonic Down Mummy Sleeping Bag by nemo
- **How much does it cost?** HK$7827 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/494467324-sonic-down-mummy-sleeping-bag)

## Best For

- nemo enthusiasts

## Why This Product

- Trusted nemo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Innovative Comfort Design:** Chevron baffles prevent down migration; Toester footbox keeps feet dry & warm.
- • **Down That Performs & Cares:** 800 FP Responsible Down Standard certified, hydrophobic and humane.
- • **Eco-Conscious Craftsmanship:** Sustainably built with 100% recycled, bluesign approved fabrics.
- • **Precision Temperature Control:** Next-gen Thermo Gill vents with multistage zipper for perfect airflow.
- • **Award-Winning Warmth & Versatility:** From -20°F to 40°F, one bag to rule all seasons.

## Overview

The NEMO Sonic Down Mummy Sleeping Bag is a high-performance, eco-friendly sleeping bag designed for extreme versatility and warmth. Featuring premium 800 FP hydrophobic down certified by the Responsible Down Standard, a 100% recycled and bluesign approved shell and liner, and advanced Thermo Gill vents with a multistage zipper system, it adapts seamlessly to temperatures from -20°F to 40°F. Its chevron baffle construction ensures consistent loft and heat retention, while the waterproof Toester footbox protects against moisture. Backed by a lifetime warranty, this award-winning bag is the ultimate choice for professional adventurers who demand comfort, sustainability, and reliability.

## Description

Product description SONIC 0F (SHORT) Sonic is built to be the only bag you need from -20°F to 40°F. The Backpacker Editors’ Choice award-winning big-mountain bag offers exceptional warmth and tuneability with a reduced environmental impact. Optimized Mummy The trim mummy shape includes a plush draft collar and bolstered draft tubes for cold protection. Premium 800 FP Down Filled with premium 800 FP hydrophobic, PFAS-free, RDS-certified down. Thermo Gills Dual-stage zippered vents release body heat without letting cold drafts in for longer usability. Toester Footbox Utilizes a layer of synthetic insulation to protect the down and deliver maximum comfort for toes. Recycled Fabrics The shell and liner are made with 100% recycled, bluesign approved materials. SPECIFICATIONS SONIC 0 video People & the Planet Achieving our mission depends on healthy people and a healthy planet. Adventures will only be possible for everyone if we can create an equitable relationship with the planet for all. We view all of our sustainability efforts through the lens of planet and people. COMPARISON CHART Sonic 0F (Short) Sonic -20F (Regular) Coda 10F (Short) Soul 15F (Short) Disco 15F (Regular) Riff 15F (Regular) Forte 20F (Regular)

Review: Warm, Water Resistant, and Large - Just so there’s no confusion, I bought the Nemo Sonic 0° bag - Long. This is hands down the best sleeping bag I have ever used, let’s get that out of the way right off the bat. I took this bag to Montana for a November Elk hunt and was very glad I spent the money on a good bag. Lows each night ranged from 10°F to -10°F. We had an uninsulated tipi style tent with a small wood stove in it, and this bag kept me warm all night every night. (A quick side bar about the tent, the stove only stayed lit for about half an hour after we went to sleep, so my review is NOT based on conditions in a wall tent with a large stove or a legitimate heating source.) I wore base layers to bed, and had a pad with an R-value of around 4.2-4.3, and with this sleeping bag it was not an issue at all. I am about 6’1” and a relatively fit 230lbs, and I’m glad I went with the long bag. It allowed me a little extra room, and I put my puffy jacket in the foot box to take up the remaining space. This is a large bag, definitely enough room to sleep on your side if you want to. I never once felt claustrophobic like I have in other mummy style backpacking sleeping bags. There are a few features on this bag that shouldn’t be overlooked.. the vents are absolutely one of my favorite parts of this bag. Even on a 10°F night I felt the need to open them about half way to let some of the heat out. Second, the waterproof foot box is absolutely a life saver if you’re sleeping in a tent. The bag as a whole is very water resistant, but with 3 guys in one tent full of wet gear the condensation was horrible in the mornings, and I never once woke up wet or cold. The third really nice feature is the “baffle” (if you’d like to call it that) which sits right about at your shoulders. It separates the air between your body and your head which made a world of difference when it came to heat retention. My only complaint about the bag at all is that I don’t like where the small pocket for your cell phone, gps, etc. is located on the bag. I think it’s kind of an awkward spot, but it certainly wouldn’t have kept me from buying the bag. Obviously I am not suggesting anyone try this, but I am very confident that with puffy pants and a puffy jacket on, I could have slept in this bag at temps near -20°F without much of an issue. Overall, I think this bag is extremely versatile. I think it could realistically be used very comfortably any time the lows will be between -10°F and 40°F (open the vents near 40°). If you’re on the fence, invest the money into a high quality bag like this because no one wants a trip ruined due to poor sleep.
Review: It’s true to the temperature rating!!! - Incredible sleeping bag tested it to the max out in the Yukon wilderness on a week long moose hunt!! Best mommy bag I’ve ever bought!!

## Features

- Nylon
- Award-winning design updated for even greater warmth retention and adjustability across temperatures.
- Constructed with 100% recycled, bluesign approved shell and liner fabrics.
- Second-generation Thermo Gill vents 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.
- Chevron baffle construction better compartmentalizes down for more uniform loft and down migration prevention.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09RN9NR6N |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #508,633 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #853 in Camping Sleeping Bags |
| Brand | Nemo |
| Brand Name | Nemo |
| Closure Type | Zipper |
| Color | Goodnight Gray / Goldfinch |
| Customer Reviews | 4.5 out of 5 stars 9 Reviews |
| Fabric Type | Nylon |
| Fill Material Type | Down |
| Global Trade Identification Number | 00811666034519 |
| Item Dimensions L x W | 13"L x 9.5"W |
| Item Weight | 1.42 Kilograms |
| Manufacturer | Nemo Equipment |
| Manufacturer Part Number | 811666034519 |
| Maximum Height Recommendation | 72 Inches |
| Model Number | NM-SNC3-S |
| Occupancy | 1 Person |
| Seasons | All Seasons |
| ShellMaterial | Nylon |
| Size | Short |
| Temperature Rating | ISO Comfort: 14F / -10C (about -10 degrees Celsius) |
| UPC | 811666034519 |
| Warranty Description | Every NEMO Product is backed by a lifetime warranty against defects in workmanship and materials. |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** Nemo
- **Closure Type:** Zipper
- **Color:** Goodnight Gray / Goldfinch
- **Fill Material:** Down
- **Item Weight:** 1.42 Kilograms
- **Occupancy:** 1 Person
- **Product Dimensions:** 13"L x 9.5"W
- **Seasons:** All Seasons
- **Temperature Rating:** ISO Comfort: 14F / -10C (about -10 degrees Celsius)

## Images

![Sonic Down Mummy Sleeping Bag - Image 1](https://m.media-amazon.com/images/I/61O2LA1R34L.jpg)
![Sonic Down Mummy Sleeping Bag - Image 2](https://m.media-amazon.com/images/I/81PTtbGvN0L.jpg)
![Sonic Down Mummy Sleeping Bag - Image 3](https://m.media-amazon.com/images/I/81W9hhGeqTL.jpg)
![Sonic Down Mummy Sleeping Bag - Image 4](https://m.media-amazon.com/images/I/81POWmAVTIL.jpg)
![Sonic Down Mummy Sleeping Bag - Image 5](https://m.media-amazon.com/images/I/61uZSiY5pZL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Warm, Water Resistant, and Large
*by G***T on January 18, 2023*

Just so there’s no confusion, I bought the Nemo Sonic 0° bag - Long. This is hands down the best sleeping bag I have ever used, let’s get that out of the way right off the bat. I took this bag to Montana for a November Elk hunt and was very glad I spent the money on a good bag. Lows each night ranged from 10°F to -10°F. We had an uninsulated tipi style tent with a small wood stove in it, and this bag kept me warm all night every night. (A quick side bar about the tent, the stove only stayed lit for about half an hour after we went to sleep, so my review is NOT based on conditions in a wall tent with a large stove or a legitimate heating source.) I wore base layers to bed, and had a pad with an R-value of around 4.2-4.3, and with this sleeping bag it was not an issue at all. I am about 6’1” and a relatively fit 230lbs, and I’m glad I went with the long bag. It allowed me a little extra room, and I put my puffy jacket in the foot box to take up the remaining space. This is a large bag, definitely enough room to sleep on your side if you want to. I never once felt claustrophobic like I have in other mummy style backpacking sleeping bags. There are a few features on this bag that shouldn’t be overlooked.. the vents are absolutely one of my favorite parts of this bag. Even on a 10°F night I felt the need to open them about half way to let some of the heat out. Second, the waterproof foot box is absolutely a life saver if you’re sleeping in a tent. The bag as a whole is very water resistant, but with 3 guys in one tent full of wet gear the condensation was horrible in the mornings, and I never once woke up wet or cold. The third really nice feature is the “baffle” (if you’d like to call it that) which sits right about at your shoulders. It separates the air between your body and your head which made a world of difference when it came to heat retention. My only complaint about the bag at all is that I don’t like where the small pocket for your cell phone, gps, etc. is located on the bag. I think it’s kind of an awkward spot, but it certainly wouldn’t have kept me from buying the bag. Obviously I am not suggesting anyone try this, but I am very confident that with puffy pants and a puffy jacket on, I could have slept in this bag at temps near -20°F without much of an issue. Overall, I think this bag is extremely versatile. I think it could realistically be used very comfortably any time the lows will be between -10°F and 40°F (open the vents near 40°). If you’re on the fence, invest the money into a high quality bag like this because no one wants a trip ruined due to poor sleep.

### ⭐⭐⭐⭐⭐ It’s true to the temperature rating!!!
*by B***D on October 17, 2025*

Incredible sleeping bag tested it to the max out in the Yukon wilderness on a week long moose hunt!! Best mommy bag I’ve ever bought!!

### ⭐⭐⭐ Nemo is skimping on the fill
*by J***B on May 6, 2024*

Nemo and many other companies quality has declined in the recent years. This bag had significantly less fill in many areas compared to previous bags despite the same temperature rating. I suspect that the cause is because some of their earlier bags temp ratings weren't certified and were likely designed to over perform. Now that the temp ratings are certified, Nemo likely removed "extra" fill in areas that performed above the rating to save money. The quality of the down also seems to have decreased along with the quantity as the new down seems like more feather and less down (yes there is a difference).

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-05-31*