Make sure the pocket is accessible and not uncomfortable when full. When you unfold it, the bag measures 87 by 29.5 inches, and its maximum height is 6 feet 10 inches. We found that the sleeping bags with a thick waterproof shell didn't seem to need hydrophobic down as it was hard to get the down inside the bag wet at all, short of sticking the garden hose inside the bag. Even in the summer if you have a cold snap or start feeling unwell, these can be left lacking. Other bags had "gills" to allow you to vent at the base of the climb, where you may not encounter conditions even close to 0F. However, with the added airspace a larger cut bag provides, there is more uninsulated space inside the bag, and it is less thermally efficient. For super-cold weather, or hiking that involves going over 10,000 feet, you’ll probably want to go with a 0°F bag. Features are a subjective, multifaceted metric, comparing aspects universal to all the bags, such as draft tubes, hoods, and zippers, while also factoring in characteristics unique only to certain bags. Hiking in frosty conditions or at altitude is hard, and after a strenuous day, getting a good night’s sleep is difficult enough – without being cold as well. But, they have an extremely good warmth-to-weight ratio keeping you very warm on cold mountain nights. If you tend to sleep “cold” at home, when you are not exhausted from 7 hours on the trail then I would suggest you opt for the warmer bag, rated 0°F. The Nemo Sonic 0 is a toasty, lightweight, and versatile sleeping bag that is designed to keep you comfortable, warm, and cozy wherever your camping adventures happen to take you. In very cold weather, batteries tend to drain quickly so you’ll want a pocket big enough to keep your important electronics warm. Hydrophobic down: down that is treated with a polymer to make it somewhat water resistant. But it's usually very expensive. These heavier, budget-friendly bags make for stronger legs and heavier wallets as compensation. Extra fabric equates to extra weight and less space in your backpack. The Mountain Hardwear Phantom is a solid sleeping bag for the price point. If you sleep with a few layers of clothing, then the extra room might suit you. Our Editors independently research, test, and rate the best products. If you have an allergy to down, or simply don’t want to spend the money, then check out these synthetic winter sleeping bags. Coupled with a good thermal sleeping bag liner this bag is super-warm. Here our lead tester is psyched to get up and go skiing. What elevates its score is the super comfy 66" cut in shoulders and its 30 ounces of 850 fill down, making our favorite balance of warmth, weight, and comfort for winter camping in the lower 48. Privacy | Cookies | Terms, The world's most in-depth and scientific reviews of gear. Alternatively, if a bag can withstand the elements well enough on its own, you get a bonus weight savings since you don't have to bring along a bivy sack or a tent. This bag is suitable for both supported treks and unsupported backpacking in rugged, cold environments. Often synthetic is recommended for the treks that require camping, such as Kilimanjaro (except Marangu route), Mt Kenya, and the Annapurna circuits, as there is more risk of getting wet, and often on these treks, someone else is carrying your gear. Remember, there is often no other heat source except for your body heat in most winter trips; building fires isn't always an option. They are an attempt to standardize the conversion from an insulation value to a temperature range. This is a better choice for folks getting around on a snowmobile, horse, or dogsled. The REI Co-op Down Time 0 is a down bag for everyone that easily outperforms similarly rated and priced synthetic bags. One of the most versatile sleeping bags on the market, Mountain Hardwear’s Phantom Gore-Tex Sleeping Bag is capable of keeping you warm on a backpacking, skiing, climbing or mountaineering trip. Got feedback? Our testers found they could sleep comfortably in this bag in any position, even in the classic "can opener" position, due to the slight stretch in the middle. The last type is the winter sleeping bags which are perfect for temperatures below 20 degrees Fahrenheit. If space and weight is a major consideration, then down will out-perform synthetic insulation every time. October 10, 2019 at 8:24 am. I would recommend taking a sleeping bag liner to improve it’s warmth. We'd bet on it. There are two important indicators in our tests: the fill weight and the weight of the rest of the bag. The warmest bags in our selection are the bags with the most loft and the most fill material. Small storage pocket for headlamp or batteries, Narrow cut for thermal efficiency and weight savings, Impressive warmth falls noticeably short of heavier models, Comfortable for many different sleeping positions, Not as warm as other bags rated to the same temperature, Super wide cut for storing boots, water, or extra clothing, Reinforced inside the toe box to resist damage from boots. Time for the “stats”; this sleeping bag has comfort ratings of -7°C and has an extreme rating of a freezing -31°C. The Nemo Sonic is an extremely comfortable sleeping bag. Being an entry-level sleeping bag, it is heavier than the more premium down sleeping bags but for the price, it’s a great buy. Here we were able to squeeze the air out of The North Face Inferno, but only a minuscule amount of water got in. Maybe it makes sense to get a more weather resistant shell if you often face damp climates during your winter excursions. This bag is a budget down sleeping bag that performs well. It's designed for use by adults, boys, girls, and kids alike. All that being said, I always use a down winter sleeping bag! The bag compresses very small and is lightweight. It’s perfectly possible to have a comfortable night’s sleep with a good 15°F rated sleeping bag. If you are looking for a great value, not too heavy synthetic sleeping bag, this one is a worthy contender. This results in a total loss of insulating properties. Additionally, if you're interested in the Snowbunting for alpine and big wall climbing, you'll likely be on your back anyway, sleeping on a narrow ledge or nestled among the rocks. This design traps the heat next to your body, minimizing heat loss so you stay warmer through the night. The REI Down Time is warmer than both of these, which is a large reason it gets our attention as a stellar budget-focused purchase. BEST FOR: GROUND SLEEPING; REI Co-op Down Time. No bag is designed to withstand full submersion, but many of the bags proved highly water resistant. The Mountain Hardwear Hyperlamina Torch is a top-class, premium-quality synthetic sleeping bag. A major consideration is always going to be weight and compressibility. Most winter sleeping bags will state that they are 15°F or 0°F – although as we’ve seen, there are a number of variations within these ratings. The Western Mountaineering Kodiak MF packs down to a backpack-friendly size, even though it's one of the wider and warmer bags in the review. Top Pick: RAB Ascent 700 or Mountain Hardwear Phantom Flame. I can’t stand a tight foot box. It will take longer to bring the sleeping bag from the ambient temperature to a suitable body heat temperature and feel warm inside. Home » Gear » Sleeping » 11 of the Best Winter Sleeping Bags. The Western Mountaineering bags have the largest storage sacks so that you can store them at the maximum loft. Read review Western Mountaineering Versalite. The Rab Ascent 900 and Nemo Sonic include a stuff sack with compression straps, and the Rab Neutrino 800 comes with a dry bag. A bag with a high loft (a combination of fill weight and fill power) will keep you warmer because there will be more insulated air between you and the cold air outside. Thankfully, modern down bags allow us to stay alive and even sleep comfortably in the coldest conditions with waterproof/breathable fabrics, hydrophobic down, and various clever design strategies. If it’s hot, you can unzip it but it’s got the capacity to keep you warm if the temperature drops. The Marmot Col is a great bag for expeditions, where you'll likely spend days on end inside your sleeping bag, staying warm and waiting for good weather. The bag can be great if you are going to walk in but then camp. The best winter sleeping bag for the money is the Coleman North Rim Sleeping Bag. While it's a touch more expensive than the Kelty Cosmic Down 0, we think it's worth this tiny price bump for better overall performance. This is at no extra cost to you and buying from our links helps support the site! The REI Down Time is very similar to the Cosmic Down in this aspect. If you are wanting to purchase a synthetic bag without the premium price tag but with the warmth and quality that you need this one will do it. Say you were to rip a hole in your tent or break your leg far away from the nearest help, your sleeping bag will likely be the difference between getting rescued or becoming hypothermic waiting to be rescued. Let us help. Having weighed up the merits of a wide array of the best cold weather sleeping bags out there, this one stood out as a clear, hands-down winner. If comfort is your top priority, this could be the bag you've been looking for. The warmest bags in our selection are also some of the heaviest. A lot of heat is lost through your head, so a decent hood is important. For very high elevations or if you tend to sleep cold, then you might find that this bag isn’t as warm as the more premium-priced synthetic bags. Additionally, the more fatigued you get, the colder you will feel. The best winter sleeping bags are the High Peak Outdoors Cascade -40 sleeping bag, the Black Pine Grizzly winter sleeping bag, and the Teton Sports Cold Weather sleeping bags. The Western Mountaineering Versalite, conservatively rated to 10 degrees, is the lightest bag in our review but is still warmer than the heavier Nemo Sonic due to its high loft and a narrower cut. Conversely, if you are spending weeks climbing Denali, or weeks camping in remote and cold locations, a thermally efficient cut can get tight quickly. Both the 850-fill Goose down and outer shell fabric is treated to be water-repellent and won’t absorb moisture even in damp conditions. You want to make sure that the sleeping bag you choose will actually fit. Best winter sleeping bag; best winter sleeping bags; 34 comments . If you continue to use this site we'll assume that you're happy with it. The most expensive winter sleeping bag is the Fjallraven Polar -30 C° Degree Sleeping Bag. They were just that waterproof. Be aware that larger sizes (obviously) add weight and volume, an important consideration when backpacking. The Western Mountaineering Kodiak MF (2.85 lbs) cuts off a few ounces while still having a wide fit and great features due to its light shell fabrics. Before retiring, drink a hot drink to warm your core and walk around a little to get the blood flowing. He's used roomy bags for weeks of living out in the snow and more lightweight bags for alpine missions in the Sierra. Hydrophobic down is not waterproof, but it dries quicker and the feathers don’t clump together so quickly. Get it as soon as Tue, Dec 29. Draft collars are key for keeping out the cold. We only make money if you purchase a product through our links, and we never accept free products from manufacturers. The welterweight Western Mountaineering Antelope MF tips the scale at 2 lbs 10 oz, similar to the Nemo Sonic, but the high-quality lightweight shell allocates more of that weight to insulation, so it feels warmer. This sleeping bag offers a lot of features including cinchable hoods, zipper draft tubes, and draft collars. With a compression sack, all the bags pictured here packed down even smaller. This bag arrived loosely packed in a large storage sack, a good sign that the 650-fill duck down isn't stored in a compressed state and a nod to REI's commitment to quality, even when handling the less expensive duck down. 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