Naturehike, Mummy Sleeping Bag, Pro Outdoor Down Sleeping Bag for Cold Weather, Water Repellent Sleeping bag with Compression Sack, High Fluffy Duck Down Filling, For Hiking/Travel/Expedition
Naturehike, Mummy Sleeping Bag, Pro Outdoor Down Sleeping Bag for Cold Weather, Water Repellent Sleeping bag with Compression Sack, High Fluffy Duck Down Filling, For Hiking/Travel/Expedition
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DESCRIPTIONS
DESCRIPTIONS
Naturehike Sleeping Bag Series : Snow Bird - Mummy Down Sleeping Bag
This sleeping bag is made of 20D waterproof nylon fabric, which is effectively prevents wet and cold air from entering. Filled with 650FP selected duck down certified by authoritative organizations, not only fluffy and lightweight, but also safe, with superior warmth. Dual wind-blocking strip design effectively prevents the cold wind from blowing in, and provides efficient heat preservation even for outdoor use. The saddle-shaped design of the neck area warmly wraps around the head and neck, effectively retaining heat, allowing you to sleep warmly. (700g/1000g down sleeping bag only). The three-dimensional design of the foot area provides space for your feet to move around without constriction. This winter sleeping bag is exquisitely crafted with a variety of quality accessories, and comes with an compression sack for easy storage. A perfect choice for adventure, camp life, hiking and more, bringing you a cozy and warm sleep experience in cold weather.
Brand: Naturehike
Item No.: CNK2550WS014
Name: Snow Bird- Mummy Down Sleeping Bag
Model SP400 / SP700 / SP1000
Color: Burnt brown / Gray brown
Down filling: 650FP Duck Down
Filling content: 400g / 700g / 1000g
Material:
Surface fabric: 20D Nylon (No down leakage)
Lining fabric: 20D Nylon (No down leakage)
Neckline: 20D nylon (No down leakage)
Zipper: YKK anti-pinch zipper
Buckle: Duraflex fastener
Expand size:
M: 74.8x29.5 in.
L:80.7x31.5 in.
Storage size:
SP400: 6.3x13.3 in.
SP700: 7.4x15.7 in.
SP1000: 7.8x16.5 in.
Weight:
SP400: M: Approx. 1.8 lbs. L: Approx. 1.9 lbs.
SP700: M: Approx. 2.6 lbs. L: Approx. 2.9 lbs.
SP1000: M: Approx. 3.6 lbs. L: Approx. 3.8 lbs.
TEMP indicator:
SP400: Comfort: 38 F Limit: 29.5 F Extreme: 1 F
SP700: Comfort: 18 F Limit: 5.9 F Extreme: -31.9 F
SP1000: Comfort: 12.5 F Limit: -1.5 F Extreme: -42.1 F
Note:
*1: Naturehike sleeping bag labeled temperature standard, the strict implementation of GB/T2842 or S023537 test requirements, by the warm body dummy equipment testing to obtain the value of accurate to 0.1, with a scientific test basis, more reference value.
*2: The temperature standard is only for reference, applicable to the general environment. The actual body feeling will change with the metabolic rate, humidity, wind, air pressure, altitude and other changes in the surrounding environment, choose the right sleeping bag according to your own body type and experience.
Recommendations for use
Stretch the sleeping bag completely 1 to 2 days before use, and check whether the sleeping bag and its accessories are complete, which will help to get a good experience when using it in the wild.
It is recommended to put warm water bag into the sleeping bag to pre-warm it in cold weather, and do not wear thick clothes such as coats when using, which will block the heat in the body from circulating in the sleeping bag and cannot obtain a comfortable sleep experience.
The sleeping bag has a good thermal effect, but it cannot generate heat by itself, it's recommended to warm up before using it.
If the climate allow, turn out the inside of the sleeping bag, placed in a clean and ventilated place for drying, which is conducive to the maintenance of the sleeping bag, and attention must be paid to avoid the direct sun at noon.
Sleeping bags are used as personal hygiene products, do not borrow from each other.
- PREMIUM DOWN FILLING: Filled with 650FP selected duck down certified by authoritative organizations, it is not only fluffy and lightweight, but also safe and warm.
- WATER-REPELLENT FABRIC: Made of 20D waterproof nylon fabric, no down leakage, and effectively prevent wet and cold air from entering.
- DUAL WIND-BLOCKING STRIP DESIGN: Effectively prevents cold wind from blowing in, and provides efficient insulation even when used outdoors.
- YKK TWO-WAY ZIPPER: High-quality zipper, smooth and firm pulling, smooth opening and closing. The zipper can be opened at both ends, which is anti-pinch and convenient to use.
- SADDLE-SHAPED NECK AREA: Wraps around the head and neck warmly, which can effectively block the cold wind blowing in, retain the heat, and warm you to sleep.(700g/1000g down sleeping bag only)
- THREE-DIMENSIONAL FOOT AREA: More room for foot movement, less restraint, allowing feet to move freely and stay warm.
- MULTIPLE CHOICES: 3 models, two sizes each with two colors to choose from, choose the right one according to the temperature indication and actual needs.
SHIPPING & DELIVERY
SHIPPING & DELIVERY
We aim to provide a smooth and reliable delivery experience for all orders placed with Havenlia.
Processing Time
Orders are processed within 1–3 business days. Once your order has been dispatched, you will receive a confirmation email with tracking information.
Delivery
Most orders arrive within 7–12 business days after dispatch. Delivery times may vary depending on the item and your location. All orders are shipped with care to ensure quality and consistency.
Free Shipping
We offer free shipping on all orders within the United States, with no additional or hidden fees.
Customer Service
Availability: Monday to Friday, 9:00 AM – 5:00 PM (EST)
Company name: Havenlia
Business Address: 535 Beluga Ave Apt D, JBER, AK 99505, United States
Business email: [email protected]
Phone: +1 (313) 999-6518
Support Information:
Our English-speaking customer support team is available to assist customers across the United States. We aim to respond to all inquiries within 24 hours on business days.
RETURNS & REFUNDS
RETURNS & REFUNDS
We want you to feel confident with every purchase. If you are not completely satisfied, you may request a return within 30 days of receiving your order.
To be eligible for a return, items must be unused, in their original condition, and in the original packaging.
Once your return is received and inspected, we will process your refund.
Support Hours
Monday to Friday, 9:00 AM – 5:00 PM (EST)
Company name: Havenlia
Business Address: 535 Beluga Ave Apt D, JBER, AK 99505, United States
Business email: [email protected]
Phone: +1 (313) 999-6518
Support Information
Our dedicated customer support team is here to assist customers across the United States. We aim to respond to all enquiries within 24 hours on business days and are committed to providing fast, friendly, and professional support.

Made to Last
Every Havenlia product is chosen for real, everyday use — durable materials, thoughtful design, and details that hold up over time. This isn't just decor, it's built to be part of your daily life.
Made for Real Life
Whether it's your morning coffee corner or a quiet evening in the garden, Havenlia products are designed to fit naturally into your everyday routine — simple, functional, and genuinely useful.
Frequently Asked Questions
How long does delivery take?
Orders are processed within 1–3 business days (Monday to Friday). Once shipped, delivery typically takes 7–12 business days.
What is your return policy?
We offer a 30-day return guarantee. You may return your item within 30 days of delivery, provided it is unused, in original condition, and in its original packaging. To start a return, contact us at [email protected].
Do I have to pay for return shipping?
Yes, return shipping costs are the responsibility of the customer, unless the item received is incorrect or faulty.
Can I cancel my order?
Yes, within 12 hours of purchase — contact us at [email protected].
Can I exchange an item?
Yes. Mention it in your return request email; exchanges are subject to stock availability.
How can I track my order?
Once your order has been dispatched, you will receive a tracking link via email.