**Assessment Report Outline**
1. Brand Introduction
2. Evaluation of Product Information
3. Evaluation of Information
4. Display of Product Details
5. Outdoor Experience
6. Evaluation Summary
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**1. Brand Introduction**
During World War II, British special forces began using natural barriers and rope nets for obstacle training to enhance field combat skills and teamwork. This marked the first systematic approach to outdoor activities. After the war, with economic growth, outdoor activities transitioned from military survival training to a lifestyle focused on entertainment, leisure, and quality of life improvement.
BlackCrag was founded to honor the resilience of British special forces during WWII. The name "BlackCrag" symbolizes strength and durability, reflecting a natural, inclusive, and persistent attitude towards life. In 1991, Daniel E. Smith's film "Eight Kilometer Death Line" introduced many people to outdoor camping and ultra-light gear, inspiring BlackCrag to become a leading brand in this space.
With a mission to provide warmth and comfort for outdoor enthusiasts, BlackCrag continuously integrates new materials and technologies into its products. As the only authorized brand of Blackstone Outdoor International in Asia, it focuses on humanized design, professional production, personalized customization, and diversified sales. With over 70 designers and more than 100 new designs each year, BlackCrag ensures that its products meet the evolving needs of outdoor adventurers.
The brand utilizes high-quality materials such as PERTEX, KOLON’s ultra-light and breathable fabrics, RIRI, YKK zippers, and Duraflex fasteners. Every product undergoes rigorous testing to ensure reliability in extreme conditions, making BlackCrag a trusted name in the outdoor industry.
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**2. Evaluation of Product Information**
Product Name: Black Rock (BlackCrag) New D Series Mummy Sleeping Bag – Ultra Light Down Sleeping Bag for Adults, 700g Cashmere
Release Date: March 11, 2015
Gross Weight: 1.1kg
Style: Mummy Type
Applicable Number: Single
Type: Down Sleeping Bag
This sleeping bag is designed for outdoor enthusiasts who value lightweight, warmth, and performance. It features a mummy-shaped design that maximizes insulation while minimizing weight, making it ideal for cold-weather adventures.
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**3. Evaluation Information**
User: Maybe_Dadong
Gender: Male
Height: 1.74m / 75kg
Location: Tianjin
Outdoor Experience: Since 2007
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**4. Product Details Display**
The compression bag features a clear logo at the center, with three compression straps that make it easy to pack and carry. The outer packaging is thin but durable, with a water-repellent treatment that offers some splash resistance. The red tag provides historical information about the brand in a subtle manner.
Inside the tag, the product details, model number, and temperature scale are clearly marked. The temperature scale includes:
- **Limit Temperature**: -17°C – The lowest temperature the sleeping bag can handle without risking hypothermia.
- **Comfortable Low Temperature**: -7°C – Ideal for a comfortable night’s sleep.
- **Maximum Temperature**: 13°C – The upper limit beyond which the user may feel too warm.
After opening the compression bag, the sleeping bag fluffs up quickly, with a soft and warm texture. There are no visible feathers, and the stitching is even and precise. The mummy-style design ensures excellent warmth retention, though it may be less comfortable for taller individuals due to limited movement.
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**5. Outdoor Experience**
Evaluation Time: April 2015
Location: Everest Base Camp (EBC) Big Loop, Nepal
Climate: Sunny, Daytime 29°C, Nighttime -10°C
Altitude: 2800–5600 meters
This 14-day trek through the EBC Grand Circle offered a mix of challenging terrain and stunning views. While the Sherpa lodges provided basic shelter, the temperatures were low, especially at higher altitudes, making a reliable sleeping bag essential.
In the early days, the weather was mild, and I only needed to wear underwear at night. However, as the altitude increased, the temperature dropped significantly. At Dingboche (4,410 meters), the sleeping bag performed well, keeping me warm despite the cold.
The sleeping bag was compact and easy to carry. When unpacked, it fluffed up instantly and had no noticeable odor. The YKK two-way zipper made it easy to access, and the anti-pinch design prevented discomfort during the night.
The interior lining was smooth and comfortable, and the bright green color gave a refreshing feel. The shoulder collar helped retain heat, and the foot pocket allowed for better air circulation. The storage bag was convenient for keeping small items like phones or cameras warm in freezing conditions.
After a few hours inside, the sleeping bag reached body temperature, providing a cozy and warm environment. Even at -10°C outside, wearing a short-sleeve cotton shirt inside the bag felt comfortable. Tightening the drawstrings ensured a snug fit and minimized heat loss.
Overall, the sleeping bag met expectations in terms of warmth, comfort, and usability. It is an excellent choice for those seeking a lightweight and reliable option for cold-weather camping.
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**Summary**
The BlackCrag D Series Mummy Sleeping Bag is a practical and cost-effective option for outdoor enthusiasts. Its mummy design ensures maximum warmth, while the high-quality materials and thoughtful features enhance usability. The zipper is smooth and functional, and the water-repellent fabric adds an extra layer of protection. The temperature rating matched real-world conditions, and the overall performance was impressive.
However, one minor issue was noted: after repeated use, the velcro on the bag became less effective and could benefit from improvement.
**Rating: 4.5/5**
**Recommendation:** Consider improving the durability of the velcro for long-term use.
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