Slumberjack s Ultrapacker sleeping bag, part of its Trekker series of functional, survivor-oriented mummy bags--offers a warm, comfortable rest at an affordable price and in three sizes (regular, long, and ultra-roomy magnum). This four-season bag is temperature rated to -20 degrees Fahrenheit--perfect for winter excursions--and has a double-layer offset construction with a differential cut that allows insulation to loft fully. The insulated draft tube keeps cold air from penetrating through the full-length, anti-snag zipper. The flip-over hood allows you to turn the hood inside out, giving you the option for a flat hood or a fully-contoured hood, while the trapezoid foot box provides space in which the feet remain in a natural position for better comfort. Other features include easy-grab pull tabs, an adjustable storm collar, and an internal media pocket for storing a digital audio player.
The regular bag has a maximum user height of 5 feet, 11 inches, the long and magnum bags have a maximum height of 6 feet, 5 inches. It s filled with Thermolite Quallofil insulation, which is engineered to deliver the optimum balance of compatibility, warmth and durability. Through its seven hole fiber technology it traps more warm air creating improved warmth retention and greater loft, even when wet.
Why a Mummy Bag?
Mummy-style sleeping bags take up less room and weigh the least. They re also smaller in size than rectangular bags, thus decreasing the amount of space around the body. The less space that needs to be warmed by body heat, the warmer the bag will be.
Specifications--Regular:
- Size: 32 by 82 inches
- Carry size: 12 by 21 inches
- Fill weight: 4 pounds, 5 ounces
- Carry weight: 6 pounds, 2 ounces
- Shell: Polyester Hex Ripstop
- Liner: Polyester Taffeta
Specifications--Long:
- Size: 34 by 86 inches
- Carry size: 13 by 21 inches
- Fill weight: 4 pounds, 13 ounces
- Carry weight: 6 pounds, 12 ounces
- Shell: Polyester Hex Ripstop
- Liner: Polyester Taffeta
Specifications--Magnum:
- Size: 36 by 90 inches
- Carry size: 13 by 21 inches
- Fill weight: 5 pounds, 2 ounces
- Carry weight: 7 pounds, 9 ounces
- Shell: Polyester Hex Ripstop
- Liner: Polyester Taffeta
About Slumberjack
Slumberjack has been known as the outdoor sleep expert or for more than 50 years. They have built this reputation for being the best by building the finest quality sleeping systems in the world, while addressing the needs of virtually all market segments from backpacking and trekking to family camping and hunting and fishing. With over five decades of experience in the industry, Slumberjack has taught everyone that roughing it doesn t have to mean being uncomfortable. That s why their selection of sleeping bags, self-inflating mats, self-inflating chairs, camp furniture, bivy shelters, and accessories offers a choice for every season and a fit for nearly every size and shape.
Amazon.com Sleeping Bag Guide
Sleep Well: Finding the Right Sleeping Bag
Sleeping bag technology has come a long way from the days of cowboy bedrolls. These days, there are a number of high-tech materials and designs available to keep you warm during the coldest outings. Here s a short list of things to keep in mind when you re shopping for a bag:
Buy for Cold
It s a safe bet that on at least one of your adventures, the nighttime temperature will drop unexpectedly. That s why it s smart to buy a bag that s rated for the lowest possible temperature you expect to face on your camping and backpacking trips. For summer trips, a bag rated at +35 degrees or higher will likely do the trick. If you like to camp in higher elevations in the summer, or if spring and fall outings are in your future, consider bags rated from +10 to +35. Winter adventurers should look for bags in the -10 to +10 range, while those on serious winter alpine climbs and expeditions will want a bag rated lower than -10.
Keep in mind that sleeping bag manufacturers temperature ratings only estimate the minimum temperature at which the bag will provide warmth. Take these numbers with a grain of salt, as different folks generate different amounts of heat when they sleep. If you re the type who likes to pile on the covers even on warmer nights, go for a bag that s rated ten degrees colder. The opposite is true for warm sleepers--a 35-degree bag will probably work for you on a 25-degree night.
Goose or No Goose?
The most important component of any sleeping bag is its insulating material. Modern sleeping bags offer two choices: goose down or synthetic. While both materials have advantages and disadvantages, down bags are considered superior because of their phenomenal warmth-to-weight and warmth-to-bulk ratios. While providing great insulation, down is extremely compressible and light. There s a reason why geese can fly and stay warm through the winter! Down also boasts great long-term durability and will typically retain its insulating properties after years of use.
All of that said, there are many high-quality synthetic bags on the market and synthetic materials are getting better all the time. While a synthetic bag will weigh somewhat more than a down bag at an equivalent temperature rating, synthetic bags perform better when wet. (Yes, the Achilles heel of down is that it loses all insulating properties when wet.) If your trips take you to wet climates, you may want to consider a synthetic bag for this reason alone. Keep in mind, too, that many people are allergic to down--synthetic bags are non-allergenic. Finally, down is considerably more expensive than synthetic, which might tip the balance for adventurers on a budget.
Bags for All Shapes
Sleeping bags come in two basic shapes that reflect their intended use. Mummy-shaped bags offer the best warmth because they conform to the body s contours. This minimizes the amount of body heat the body must put out to maintain a constant temperature. Many mummy bags are offered in women-specific shapes and sizes, as well. Rectangular bags, while they do offer more room to toss and turn, are less thermally efficient because they contain more open air space. Also, they are typically heavier than mummy bags, and are generally not offered with down insulation, making them best suited for car camping or short backpacking trips.
Pad Yourself
No matter what kind of bag you choose, a sleeping pad is a required accessory. Not only do they provide much-needed comfort when sleeping on the ground, pads also offer crucial warmth for your backside, as the weight of your body compresses--and renders virtually useless--the sleeping bag insulation that lies beneath you.
Slumberjack Ultrapacker -20-Degree Mummy Sleeping Bag (ID: B000AD30CW)
