The TETON Sports Mammoth 0F Sleeping Bag is designed to give you the best night’s sleep while you enjoy your time outdoors. When you purchase a double wide sleeping bag, it’s best to look for a bag that will keep you warm from all sides. The Mammoth has shoulder and zipper draft tubes, drawstrings at the shoulder and around the head, dual-layer construction with offset stitching, and is filled with SuperLoft Elite four-channel hollow fiber insulation—all these features work together to keep you warm and comfortable anywhere you set up base camp. If you get too warm, just unzip the bag a little at either corner or down the side. The bag comes apart in two massive quilts for ventilation or you can zip multiple Mammoth bags together for an even BIGGER sleeping bag. Comes with a free compression sack. Here’s a storage tip: Stuff the bag in, don’t try to roll it up and then put it back in the sack.The perfect bag for any family outing, the Teton Mammoth bag is comfortable, warm, and large enough to accommodate almost any camper–and sometimes even two or three. The Mammoth sports a soft cotton flannel lining with a temperature rating of 0 degrees F, helping campers stay cozy in almost any family camping locale. The bag’s shoulder baffle and pair of full-length zipper draft tubes, meanwhile, help keep warmth in and cold out, a must on chilly fall evenings. And campers who really want to insulate will delight in the adjustable mummy hood, which pulls down tight for extra warmth.

But the real attention-getter is the Mammoth’s massive size, which can comfortably hold a pair of adults plus one small child, or as many as four young children at once. The large sleeping pocket makes this bag ideal for family trips to the beach, backyard sleepovers, and a ton of other people-intensive situations. Plus, should campers need to get out of the bag without disturbing their partners, they can simply use the full-length zipper on either side to make a quick exit.

Other features include internal storage pockets on both sides for holding keys, wallets, and other valuables and an Oxford nylon compression sack that makes the Mammoth easy to transport and store. The Mammoth measures 94 inches long by 62 inches wide and weighs 17 pounds. It’s also backed by a limited lifetime warranty.

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.

Product Features

• THE ESSENTIAL COUPLE’S SLEEPING BAG: Has plenty of room for two to spread out–it’s enormous at 94×62 inches (239×157 cm); Pack weight 16.5 pounds (7.5 kg)
• HIGH-QUALITY MATERIALS: Taffeta shell and flannel liner withstand years of use; SuperLoft Elite fiber fill and construction work together to eliminate cold spots and drafts
• ADDED COMFORT: Brushed flannel liner feels like bed sheets; Zipper and shoulder draft tubes keep the cold air out; Unzips on each side and the bottom for easy access and ventilation
• 0 DEGREE SLEEPING BAG: Survival rated for cold temperatures–rated at zero degrees for cool to frozen conditions; Bag will be comfortable to temperatures well below freezing (32F/0C)
• LIMITED LIFETIME WARRANTY: TETON Sports’ AMAZING customer service team is one YOU CAN COUNT ON to get your products taken care of and get you back OUTDOORS; #getoutdoors with TETON Sports