
The Eureka Casper 15-Degree sleeping bag is a mummy-style bag designed for users seeking a lightweight, compact, and affordable option. It features a trapezoidal footbox, a bag-within-a-bag design, and a two-way self-repairing zipper. While it is marketed as having a 15-degree Fahrenheit temperature rating, some users report that it may be closer to 35 degrees. The bag has mixed reviews regarding its fit, with some users finding it comfortable and others noting that it is very tight, especially in the hip area. The Eureka Casper is a good choice for backpacking due to its compact size, and it can easily fit into a sleeping bag compartment in a medium-sized or larger backpack.
| Characteristics | Values |
|---|---|
| Temperature rating | 15 degrees Fahrenheit |
| Size | Compact |
| Weight | 2 pounds 15 ounces |
| Length | 78 inches |
| Girth | 62 inches at the shoulders, 52 inches at the waist |
| Materials | Polyester and synthetic insulation |
| Features | Bag-within-a-bag design, trapezoidal foot section, adjustable contoured hood, two-way self-repairing zipper, stash pocket, exterior pillow pocket, compression stuff sack |
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What You'll Learn
- The Eureka Casper 15-degree sleeping bag is lightweight and compact
- The bag is 78 inches long and fits women up to 5'8 tall
- The bag has a trapezoidal foot section to allow for the natural sleeping position
- The bag has a bag-within-a-bag design to prevent thermal leaks
- The bag has mixed reviews, with some saying it's a tight fit and others saying it has plenty of room

The Eureka Casper 15-degree sleeping bag is lightweight and compact
The Eureka Casper 15-degree sleeping bag is a great option for those seeking a lightweight and compact sleeping bag. With a carry weight of 2 pounds and 15 ounces, it is a good choice for backpacking trips, compressing easily to fit into a sleeping bag compartment of a medium-sized backpack or larger. The bag is filled with Eureka's proprietary Rteq fibre fill, which provides maximum warmth with minimal weight and packs down to a compact size. The bag-within-a-bag design prevents cold air from entering and warm air from escaping, ensuring consistent insulation throughout.
The Eureka Casper 15-degree sleeping bag is designed with a mummy shape, featuring a trapezoidal foot section angled to accommodate the foot's natural sleeping position. It also includes a fully adjustable contoured hood, allowing for a snug fit. The bag measures 78 inches in length, making it suitable for women up to 5 feet 8 inches tall. For taller individuals, a Long version is available, measuring 83 inches in length. The girth of the bag is 62 inches at the shoulders and 52 inches at the waist, providing extra room in the hips while maintaining a narrow shoulder width.
The Eureka Casper 15-degree sleeping bag offers convenient features such as a two-way, self-repairing zipper, an interior stash pocket, and an exterior pillow pocket. The women's version of the bag includes additional specialised features, such as a trapezoidal-shaped footbox to accommodate colder toes and a cinch cord at the collar. The bag also comes with a compression stuff sack, allowing for easy storage and transport.
The bag has received positive reviews for its warmth, lightweight design, and compact size. It is a good choice for three-season use, providing adequate warmth down to temperatures of around 20 degrees. However, some users have noted that it may not be suitable for extremely cold conditions, and it is recommended to pair it with thermal layers for winter camping. Additionally, while the bag is designed to accommodate individuals up to 5 feet 8 inches tall, taller individuals may find it snug.
Overall, the Eureka Casper 15-degree sleeping bag is an excellent choice for those seeking a lightweight and compact option for their outdoor adventures. With its durable construction, convenient features, and affordable price, it offers a great value for the occasional backpacker or avid adventurer alike.
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The bag is 78 inches long and fits women up to 5'8 tall
The Eureka Casper sleeping bag is 78 inches long, which is a standard length for men's sleeping bags. Women's sleeping bags are usually shorter, with regular sizes fitting women up to 5 feet 4 inches tall and long sizes fitting women up to 5 feet 10 inches tall. However, the Eureka Casper bag is designed with women's-specific features, such as extra room in the hips, narrower shoulders, and a trapezoidal-shaped footbox to accommodate the female physique. The bag's length of 78 inches makes it suitable for women up to 5 feet 8 inches tall, providing enough room for both the head and toes to adjust the sleeping position comfortably.
When choosing a sleeping bag, it is essential to consider not only the length but also the shoulder girth and hip girth. The Eureka Casper bag has a shoulder girth of 62 inches and a hip girth of 52 inches, which are within the standard ranges for women's sleeping bags. The bag's trapezoidal foot section is angled to allow for the natural sleeping position of the foot, and it also includes a fully adjustable contoured hood for added warmth.
While the Eureka Casper bag is designed to fit women up to 5 feet 8 inches tall, individual preferences and build can vary. Some users have noted that the hip area of the bag is very tight, making it difficult to move around when zipped up. Therefore, it is always recommended to test out different sleeping bags to find the one that best suits your personal comfort and warmth needs.
To fit the Eureka Casper sleeping bag into the Osprey sleeping bag compartment, it is essential to consider the size and compression of the bag. The Casper bag is known for its compactness and ability to compress into a small size. It fits easily into medium-size packs or larger when backpacking. When packing the bag, ensure that it is compressed tightly and consider using a compression sack with good straps to maximize space. Additionally, undoing the compartment divider in the Osprey bag can provide more room for the sleeping bag.
Overall, the Eureka Casper sleeping bag, with its length of 78 inches, is suitable for women up to 5 feet 8 inches tall. Its women's-specific features and compact design make it a comfortable and convenient option for backpacking and camping adventures. When packing into the Osprey sleeping bag compartment, focus on compressing the bag tightly and utilizing the available space efficiently.
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The bag has a trapezoidal foot section to allow for the natural sleeping position
The Eureka Casper 15-Degree Mummy Sleeping Bag is a great choice for backpackers. It is lightweight, compact, and fits easily into the sleeping bag compartment of a backpack. The bag is designed to keep you warm and comfortable in temperatures as low as 15 degrees Fahrenheit. For colder temperatures, it is recommended to pair the bag with thermal layers or a warmer sleeping bag.
One of the key features of the Eureka Casper bag is its trapezoidal foot section. This design allows for the natural sleeping position of the foot, providing more space for your feet to rest comfortably. The trapezoidal shape is a common feature in sleeping bags, often referred to as a "trapezoidal" or "flared" footbox. This shape not only provides comfort but also helps to reduce heat loss, as the feet are more vulnerable to heat loss than other parts of the body.
The trapezoidal foot section is angled to follow the natural curve of your feet and lower legs, ensuring that your feet are not restricted or cramped. This allows you to sleep in a natural and comfortable position, which is crucial for a good night's rest, especially when camping or hiking. The footbox is also designed to keep your toes warm, a welcome feature for those who tend to experience cold feet.
The Eureka Casper bag also offers other convenient features, such as a compression stuff sack, a stow pocket for small items, and a two-way self-repairing zipper. It is filled with Eureka's proprietary Rteq fiber fill, which maximizes warmth while minimizing weight and packed size. The bag is designed with a bag-within-a-bag design, creating a consistent thickness of insulation to prevent thermal leaks and keep you warm throughout the night.
Overall, the Eureka Casper 15-Degree Mummy Sleeping Bag is an excellent choice for backpackers and campers looking for a compact, lightweight, and affordable option that provides comfort and warmth during their outdoor adventures. The trapezoidal foot section is a notable feature that contributes to a good night's sleep by allowing for a natural sleeping position and helping to retain warmth.
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The bag has a bag-within-a-bag design to prevent thermal leaks
The Eureka Casper 15-Degree Mummy Sleeping Bag is a bag-within-a-bag design that prevents thermal leaks. The inner layer of the bag is cut smaller than the outer layer, creating a consistent thickness of insulation throughout the bag. This design prevents cold air from entering the bag and stops warm air from escaping. This bag is ideal for those seeking a lightweight compact bag at a great price.
The bag's compact size makes it perfect for medium-size packs or larger when backpacking. It is lightweight and compresses easily, fitting into the sleeping bag compartment of a backpack. The trapezoidal foot section is angled to allow for the foot's natural sleeping position. The bag also features a fully adjustable contoured hood, a two-way self-repairing zipper, an inside stash pocket, and an exterior pillow pocket.
The bag is filled with Eureka's proprietary Rteq fibre fill, which provides maximum warmth with the lightest weight and most compact stuff size. The bag is rated to 15 degrees Fahrenheit and is suitable for three-season use. It is a great value option, with the weight, size, and features of more expensive bags at a fraction of the cost.
The Eureka Casper 15 is a women's-specific bag, with extra room in the hips, narrower shoulders, and a trapezoidal-shaped footbox to keep toes warm. It is a synthetic sleeping bag, so it will keep you warm even if it gets wet, though it is slightly heavier than a down sleeping bag. Overall, the Eureka Casper 15 is a great choice for a compact, lightweight, and affordable sleeping bag that effectively prevents thermal leaks with its bag-within-a-bag design.
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$9.99

The bag has mixed reviews, with some saying it's a tight fit and others saying it has plenty of room
The Eureka Casper 15-Degree sleeping bag has received mixed reviews from customers. Some praise the bag for its compact size, warmth, and lightweight design, making it ideal for backpacking and hiking. Others have criticised the bag for being too tight, particularly around the hip area, making it uncomfortable for those with larger hip measurements.
One reviewer on Amazon praised the bag, stating that it "fits very well in the bottom of the backpack". Another reviewer, who is 5'9", found the bag to be a "snug" fit for their frame, and recommended wearing thermals for added warmth. A reviewer on Trailspace, who is 6 feet tall, found that the bag had "plenty of room" and did not experience any issues with the fit, apart from the zipper being hard to pull.
On the other hand, some customers have found the bag to be too small and tight-fitting. One reviewer on Amazon mentioned that the hip area was "extremely tight" and made it difficult to move around while zipped up. This sentiment was echoed by another reviewer on Trailspace, who is 5'8" and wears a women's XL size. They found that they could not zip up the bag with their arms inside and felt that it was too small.
The Eureka Casper 15-Degree sleeping bag is designed to be lightweight and compact, with a bag-within-a-bag design that keeps out cold air and traps warm air inside. It has a trapezoidal foot section that allows for the natural sleeping position of the feet. The bag also features a fully adjustable contoured hood and a two-way, self-repairing zipper. While it offers a range of features and a lightweight design, some customers have found that the bag's compact size compromises comfort, particularly for those with larger body types.
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Frequently asked questions
The Eureka Casper is a compact sleeping bag that fits into medium-size packs or larger. To fit it into the Osprey sleeping bag compartment, undo the compartment divider and stuff the sleeping bag through the top. Use your body weight to compress the sleeping bag into the bottom of the pack.
The Casper 15 compresses down to a small size, with a length of 78 inches and a girth of 62 inches at the shoulders and 52 inches at the waist. It weighs 2 pounds and 15 ounces.
The Eureka Casper is a 3-season sleeping bag rated to 15 degrees Fahrenheit. It may not be suitable for temperatures below 20 degrees Fahrenheit. For colder temperatures, consider a 0-degree bag.











































