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Nemo Sonic 0
■Excerpt from the manufacturer's description
Fast and safe, even in extreme conditions
The ultimate big-mountain sleeping bag that conquers extreme cold
The Sonic Series is the only sleeping bag designed to handle temperatures ranging from -29°C to 4°C. Winner of the Editors’ Choice Award from Backpacker magazine, this big-mountain bag offers superior insulation and a wide range of temperature adjustments for comfort, while also being designed to minimize its environmental impact.
This sleeping bag features the latest version of the “Thermogill” temperature regulation system. Zippers located on the inside and outside of the chest area significantly expand the temperature range, allowing for precise adjustment to maintain a comfortable temperature while sleeping.The stylish chevron baffle construction prevents down from shifting while you sleep and maintains even loft throughout the generously filled down.
The shell and liner fabrics are made from 100% recycled materials and are bluesign certified, while the premium 800-fill-power water-repellent down is 100% Responsible Down Standard (RDS) certified.Based on years of field testing, the Sonic has been upgraded in every detail, featuring a perfect profile, a redesigned draft collar, and an enlarged draft tube.
The Toaster footbox at the foot end keeps your feet warm, provides waterproof protection against condensation from the tent walls, and protects the down from moisture while allowing damp clothing to dry inside.Capable of handling whatever challenges the mountains throw at it, the Sonic continues to make a name for itself as the ultimate partner for extreme weather conditions.
○ 800-fill-power water-repellent down
The lightweight, packable 800-fill-power RDS-certified down is treated with an eco-friendly, PFAS-free water-repellent finish, overcoming the traditional weakness of down in wet conditions.Not only is it more water-resistant than standard down, but it also dries quickly when wet, delivering excellent insulation even in wet conditions so you can use it with confidence.
○ Chevron Baffle Structure to Maximize Down Loft
An original baffle structure that prevents down from shifting due to tossing and turning or leg movements during sleep, maximizing the loft of the generously packed down.
○ Oversized Draft Collar / Draft Tube
To enhance a sleeping bag’s warmth in the harsh conditions of midwinter, it is crucial to minimize heat loss.
The Sonic features a generously padded, high-capacity draft collar and draft tube to prevent cold air from entering around the neck and zipper. This effectively blocks cold air and securely traps internal heat, ensuring maximum warmth.
This high-performance design supports a comfortable and warm night’s sleep even in extreme cold.
○ 3D-Shaped Hood
It features a 3D-shaped hood that fits snugly around the head, much like a jacket. This effectively minimizes heat loss. Furthermore, even when the drawcord is tightened firmly, it does not feel as constricting around the face as typical sleeping bags do, providing a comfortable fit.
Furthermore, a waterproof, breathable material is used on the top of the head, which is prone to contact with the tent wall. Combined with water-repellent down, this prevents a loss of warmth due to moisture.
○ Multi-Stage ThermoGill
When choosing a sleeping bag, many people focus on protection against the cold, but in reality, it’s impossible to sleep comfortably if you’re too hot. The Sonic™ is equipped with a temperature-regulating feature called the Thermo-Gill. Even when the inside of the sleeping bag gets too hot, it allows excess heat to escape without letting in cold outside air.
Using the two zippers—one on the inside and one on the outside—you can fine-tune the temperature. This supports comfortable sleep in a variety of environments, allowing you to use a single sleeping bag comfortably over a longer season.
○ Toaster Footbox
The foot area features a 3D shape and waterproof, breathable material, balancing comfort and durability. This section is filled with more down than other areas, effectively warming the extremities—which tend to get cold easily—to support a comfortable night’s sleep.
Furthermore, an additional synthetic fiber pad in the foot area prevents the down’s performance from deteriorating due to moisture or dampness. This allows you to dry wet socks or gloves inside the sleeping bag.
This layer also prevents down from shifting due to the toes pushing upward, effectively reducing the formation of cold spots. The design, with attention to every detail, enhances both comfort and practicality.
○ Stash Pocket
A pocket is located at the shoulder area to store items you don’t want to get cold in the snowy mountains, such as smartphones and contact lenses.
○ Includes Two Storage Cases
Both a compression stuff sack for convenient transport and a mesh storage sack for home storage are included as standard.
■ Minimum Weight: 1.47 kg
■ Comfort Temperature: -10°C
■ Lower Limit Temperature: -18°C
■ Packed size: 34 × 24 cm (diameter)
■ Suitable Height: Up to 183 cm
■Filling: 800-fill power water-repellent down (RDS-certified, PFAS-free), 790 g
■Shell Material: 20D 100% recycled ripstop nylon with durable water-repellent finish (bluesign certified, PFAS-free)
■Lining Material: 20D 100% recycled polyester taffeta with durable water-repellent finish (bluesign certified, PFAS-free)
■Footbox Material: 40D 100% recycled polyester with durable water-repellent finish, waterproof and breathable (bluesign certified, PFAS-free)
*Left-side zipper
*Compression stuff sack and storage sack (for storage) are included as standard.
*Since manufacturer images are used, specifications (such as logo placement, color, and pattern placement) may differ slightly from the actual product.
■Excerpt from the manufacturer's description
Fast and safe, even in extreme conditions
The ultimate big-mountain sleeping bag that conquers extreme cold
The Sonic Series is the only sleeping bag designed to handle temperatures ranging from -29°C to 4°C. Winner of the Editors’ Choice Award from Backpacker magazine, this big-mountain bag offers superior insulation and a wide range of temperature adjustments for comfort, while also being designed to minimize its environmental impact.
This sleeping bag features the latest version of the “Thermogill” temperature regulation system. Zippers located on the inside and outside of the chest area significantly expand the temperature range, allowing for precise adjustment to maintain a comfortable temperature while sleeping.The stylish chevron baffle construction prevents down from shifting while you sleep and maintains even loft throughout the generously filled down.
The shell and liner fabrics are made from 100% recycled materials and are bluesign certified, while the premium 800-fill-power water-repellent down is 100% Responsible Down Standard (RDS) certified.Based on years of field testing, the Sonic has been upgraded in every detail, featuring a perfect profile, a redesigned draft collar, and an enlarged draft tube.
The Toaster footbox at the foot end keeps your feet warm, provides waterproof protection against condensation from the tent walls, and protects the down from moisture while allowing damp clothing to dry inside.Capable of handling whatever challenges the mountains throw at it, the Sonic continues to make a name for itself as the ultimate partner for extreme weather conditions.
○ 800-fill-power water-repellent down
The lightweight, packable 800-fill-power RDS-certified down is treated with an eco-friendly, PFAS-free water-repellent finish, overcoming the traditional weakness of down in wet conditions.Not only is it more water-resistant than standard down, but it also dries quickly when wet, delivering excellent insulation even in wet conditions so you can use it with confidence.
○ Chevron Baffle Structure to Maximize Down Loft
An original baffle structure that prevents down from shifting due to tossing and turning or leg movements during sleep, maximizing the loft of the generously packed down.
○ Oversized Draft Collar / Draft Tube
To enhance a sleeping bag’s warmth in the harsh conditions of midwinter, it is crucial to minimize heat loss.
The Sonic features a generously padded, high-capacity draft collar and draft tube to prevent cold air from entering around the neck and zipper. This effectively blocks cold air and securely traps internal heat, ensuring maximum warmth.
This high-performance design supports a comfortable and warm night’s sleep even in extreme cold.
○ 3D-Shaped Hood
It features a 3D-shaped hood that fits snugly around the head, much like a jacket. This effectively minimizes heat loss. Furthermore, even when the drawcord is tightened firmly, it does not feel as constricting around the face as typical sleeping bags do, providing a comfortable fit.
Furthermore, a waterproof, breathable material is used on the top of the head, which is prone to contact with the tent wall. Combined with water-repellent down, this prevents a loss of warmth due to moisture.
○ Multi-Stage ThermoGill
When choosing a sleeping bag, many people focus on protection against the cold, but in reality, it’s impossible to sleep comfortably if you’re too hot. The Sonic™ is equipped with a temperature-regulating feature called the Thermo-Gill. Even when the inside of the sleeping bag gets too hot, it allows excess heat to escape without letting in cold outside air.
Using the two zippers—one on the inside and one on the outside—you can fine-tune the temperature. This supports comfortable sleep in a variety of environments, allowing you to use a single sleeping bag comfortably over a longer season.
○ Toaster Footbox
The foot area features a 3D shape and waterproof, breathable material, balancing comfort and durability. This section is filled with more down than other areas, effectively warming the extremities—which tend to get cold easily—to support a comfortable night’s sleep.
Furthermore, an additional synthetic fiber pad in the foot area prevents the down’s performance from deteriorating due to moisture or dampness. This allows you to dry wet socks or gloves inside the sleeping bag.
This layer also prevents down from shifting due to the toes pushing upward, effectively reducing the formation of cold spots. The design, with attention to every detail, enhances both comfort and practicality.
○ Stash Pocket
A pocket is located at the shoulder area to store items you don’t want to get cold in the snowy mountains, such as smartphones and contact lenses.
○ Includes Two Storage Cases
Both a compression stuff sack for convenient transport and a mesh storage sack for home storage are included as standard.
■ Minimum Weight: 1.47 kg
■ Comfort Temperature: -10°C
■ Lower Limit Temperature: -18°C
■ Packed size: 34 × 24 cm (diameter)
■ Suitable Height: Up to 183 cm
■Filling: 800-fill power water-repellent down (RDS-certified, PFAS-free), 790 g
■Shell Material: 20D 100% recycled ripstop nylon with durable water-repellent finish (bluesign certified, PFAS-free)
■Lining Material: 20D 100% recycled polyester taffeta with durable water-repellent finish (bluesign certified, PFAS-free)
■Footbox Material: 40D 100% recycled polyester with durable water-repellent finish, waterproof and breathable (bluesign certified, PFAS-free)
*Left-side zipper
*Compression stuff sack and storage sack (for storage) are included as standard.
*Since manufacturer images are used, specifications (such as logo placement, color, and pattern placement) may differ slightly from the actual product.
Available Payment Methods
Credit Card Payment
Convenience Store Payment
Digital Wallets and QR Code Payments
Bank Transfer
Japan Post Bank
Cancellations, Returns, and Exchanges
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As a general rule, we do not accept returns or exchanges of merchandise for reasons related to the customer’s preferences, such as “it didn’t look like I expected” or “the size doesn’t fit.” If you have any questions or concerns, please consult with our staff first.
Please place your order after understanding and agreeing to the following points.
・Depending on the device or environment you are using, the color and texture of the product may appear slightly different.
・There may be slight variations in the dimensions listed in the product description.
・Minor scratches or scuffs may occur unavoidably during the manufacturing process.
・Depending on the material of the product, there may be variations in color, texture, or pattern from item to item.
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We make every effort to manage our inventory, but if we are unable to secure the items you ordered for unavoidable reasons, we may have to cancel your order.
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*Please note that we assume no liability for any losses, damages, or other adverse consequences resulting from a cancellation.
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While we take the utmost care to ensure the quality of our products and their packaging, in the unlikely event that an item arrives damaged or soiled, or if you receive an item that differs from your order, please contact us via the “Contact Form ” within 7 days of the delivery date. We will cover all associated costs.
・If a replacement item is available, we will replace the item.
・If we are unable to secure a replacement, we will issue a refund.
Please note that we cannot accept returns or exchanges if any of the following conditions apply. We appreciate your understanding.
・If more than 8 days have passed since the product was delivered
・When we determine that the customer has finished using the product
・If the item has been altered, washed, or dry-cleaned
・If any accessories (product tags, warranty cards, bags, boxes, etc.) are lost or damaged
・If odors, scratches, or stains occur while the item is in the customer's possession
・Items that come into direct contact with the skin, such as underwear, socks, and accessories, as well as perfumes and cosmetics, etc.
・If the item is returned without prior notice
About the Listed Prices
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Important Notes
*Please note that inventory for this item is shared across our physical stores and other shopping sites operated by our company. We check inventory after receiving your order, so the item may be out of stock in some cases. We apologize for any inconvenience this may cause and will notify you via email if this occurs. Thank you for your understanding.