A sleeping bag is probably the most important piece of camping comfort equipment. However, there are many models of sleeping bags, including mummy type, envelope type, quilt type, artificial cotton, down, bottomed and bottomless. Which one is right for you?
Why do you need a sleeping bag?
I have friends who bring bulky home quilts to camping parties. In the summer, nighttime temperatures don’t usually drop below 10 degrees Celsius, so this isn’t a problem, even if you’re running into the mountains, but even so, the bulk of the carry-on bag is a pain in the ass. A well-fitted sleeping bag will provide the same warmth and comfort while being able to be packed into a smaller, more portable size and be lighter in weight.
The need for thermal insulation is much greater outdoors than at home. Not only does your bed take you off the cold ground, but you won’t be exposed to wind, rain, and frigid temperatures. The function of a sleeping bag is to solve the above problems and effectively ensure you a warm and portable cocoon.
Not everyone needs a minus-35-degree sleeping bag designed for trekking through the Himalayas, but a basic, affordable summer sleeping bag is better than carrying a blanket when camping.
What type of sleeping bag is right for you?
You may be familiar with envelope and mummy sleeping bags, but there are many other types.
Envelope type: Sacrifice warmth, weight and packing volume to optimize space. A good option for summer drive camping, but nothing more. You don’t want to carry an envelope sleeping bag for long distances. They are usually not very expensive.
Mummy-shaped sleeping bag: Shaped close to the curves of your body, the mummy-shaped sleeping bag maximizes thermal insulation while minimizing size and weight. It also has a hood to conserve heat from the shoulders, neck and head.
Semi-Envelope: Not comfortable enough in a traditional mummy-style sleeping bag with limited space? There’s a fusion of envelope and mummy sleeping bags, offering the space of the former and the insulation of the latter. In most cases, they are slightly larger in weight and packing volume than mummy models. Each manufacturer has their own style: scoop, spiral, pyramid or other forms, but the commonality is that they all use a semi-envelope design and sacrifice weight to increase comfort for the mummy shape.
Bed type: A new sleeping bag designed by Sierra Design that emphasizes the comfort of adapting to different sleeping positions (side, lying, stomach) without sacrificing insulation, but sacrifices are made for weight and packing volume.
Quilt type: By abandoning the insulation part at the bottom, their packing volume and weight are greatly reduced. You’ll need to use an insulating moisture-proof pad with them, just like you would with any other sleeping bag. Some quilt types include foot wraps and hoods, but the original design was a flat square quilt. They’re more flexible than they sound, and on warm nights you can simply stretch your legs and feet out of the quilt and pull the quilt down to adjust to the temperature. However, it takes some practice to retain maximum heat with a quilt and sleep comfortably in it. A great option for ultra-lightweight summer backpacking, and a great way to add insulation to another sleeping bag in the winter.
Integrated cushion type: the gold standard. Similar to the concept of quilts, the design of better comfort, heat preservation, stability and security is achieved by integrating the sleeping bag and moisture-proof pad (usually modular) into one. This design minimizes weight and packing volume. However, you’ll need to buy both a sleeping bag and a moisture-proof pad to match, and usually only well-known brands make these, so they may be out of some people’s budget.
The meaning of temperature scale
It’s useless. In fact, a lack of transparency and honesty about product performance is a widespread problem in the outdoor industry. This is especially true when it comes to sleeping bag temperature scales. I once felt warmer in a sleeping bag with a temperature scale of 0 degrees than -15 degrees. Despite the use of European testing standards, there is no valid, objective, universal testing procedure that allows you to test and compare the performance of different sleeping bags from different manufacturers, and it is difficult to even get just how warm a sleeping bag is.
And the different sleep patterns we all have exacerbate the problem. I’ve been sweating hot in the same sleeping bag on the same night and my girlfriend thought she was going to freeze to death. Not only are men and women accustomed to sleeping at different temperatures, but different people of the same gender experience sleep temperature differently. The only way to know how insulating a sleeping bag is is to experience it yourself. And it’s a bit of a Catch-22.
Most sleeping bags come with two stats: comfort and ultimate. Comfort temperature is important data. Adding 5-10 degrees to this is probably the lowest temperature you will find comfortable.
This only applies to conscientious manufacturers. When camping with him, I spent the night sleeping in his own brand of rayon sleeping bag with a temperature rating of -18 degrees. The temperature dropped to -9 degrees at night, and even though I was fully clothed, I was too cold to sleep. Buy a sleeping bag from a great outdoor brand you know and trust, and still add 5-10 degrees to the comfort scale.
Down or artificial cotton?
Are you allergic to down? No? Then buy a down sleeping bag. The decision is that simple. Down has better thermal insulation properties for the same volume and is also more durable. It is crucial for any sleeping bag to dry it completely after each trip and store it loosely. However, synthetic cotton sleeping bags only have a lifespan of a few years and lose their insulation as their fibers become damaged. ability. A good quality down sleeping bag can last for decades. This also makes them expensive and good value for money.
The only advantage of rayon sleeping bags is that they retain warmth even when they get wet. You’re bound to do everything you can to keep your sleeping bag dry, and this can be easily done with a simple waterproof bag. At the same time, water-repellent coatings like Downtek also reduce the possibility of this problem, so that down still has the ability to maintain fluffiness (that is, the ability to retain heat) when soaked. Look for this technology in the sleeping bag you want to buy.
sleeping bag structure
Your down sleeping bag is constructed with partitions that keep the down in place. The shape of the partitions has a huge impact on the insulation and weight of the sleeping bag.
The best sleeping bags have box-type partitions, and they have a greater height at the seams between the different partitions to trap warm air. This is a simple, lightweight yet effective sleeping bag design.
Inexpensive sleeping bags have quilt-style partitions (Bavarian partitions) where the skin is simply sewn into different partitions. Obviously this is worse in terms of thermal insulation. Some manufacturers use double-height deformed partitions to create a structure called double-layer partitions. More material also means more weight.
Multiple layers for warmth
There are two ways to increase insulation in a sleeping bag, both of which require adding additional layers of insulation. First, we want to point out that the myth that sleeping in thermal clothing in a sleeping bag will make you colder is patently false. This is an absolutely obvious fallacy. As long as you make sure the clothing you wear is dry, the more you wear in a sleeping bag, the warmer you will be. In cold temperatures, the only thing I need to sleep on is a pair of wool socks on my feet, a base layer of merino wool and a wool hat. If I get cold at night, I add a down jacket and other necessary insulating mid-layers. More insulation means more warmth.
However, wearing all your clothes to bed is a last resort. An effective way to sleep warm without going overboard is to combine two sleeping bags. This is especially good if you have a lightweight summer sleeping bag paired with a midweight three-season sleeping bag. It doesn’t take much thinking, just figure out which two sleeping bags will fit best and pair them up.
Wondering how warm a sleeping bag is combined? I found the formula on this forum to be quite accurate
x -(70 – y)/2 = z
x = sleeping bag with better thermal insulation performance and lower temperature scale
y = A sleeping bag with slightly poor thermal insulation performance and a higher temperature scale
z = sleeping bag combination
This formula is in degrees Fahrenheit (temperatures elsewhere in the article are in degrees Celsius), and is more accurate using your knowledge of the sleeping bag’s true operating temperature than if you only know the nominal temperature scale.
And don’t forget, you need a heat-insulating and moisture-proof mat.
Features you need
There are a lot of “features” that can be added or subtracted to make it more comfortable, more convenient, lightweight or cheaper.
Zippers: They range from full size to 1/4. The longer the zipper, the easier it is to get in and out of the sleeping bag, and you need the zipper in the corresponding direction to be full size to connect two sleeping bags into a double sleeping bag. Usually the size of the zipper is marked #X, the larger the number, the wider the tooth width of the zipper. If you want your zippers to be durable and easy to repair, choose a zipper from a big brand like YKK.
Foot space: A common complaint about mummy-style or similar sleeping bags is that there is too little foot space. This part can be made wider than its upper part through a trapezoidal or three-dimensional foot design.
Partitions: Look for thick, down-filled partitions that are the same length as the zipper to block air from getting through. It would be even better if the outer layer of the partition had a thicker fabric to prevent it from being torn due to being caught by the zipper.
Face Barrier: This helps seal the space around your face so warm air can still be trapped in the sleeping bag on cold nights. They confirm that it is effective, but whether it is comfortable or not depends on the different products.
Pillow Case: Do you want to use a pillow? He helps you stay in place. Pillowcases keep your pillow in the sleeping bag, but usually require the pillow and sleeping bag to be from the same manufacturer.
Pad Covers and Webbing: Designed to securely link pads to sleeping bags, from simple grommets that can be threaded through ropes to integrated, full-length pad covers that can accommodate pads of specific widths, lengths, and shapes. When choosing, consider what kind of moisture-proof pad you will use and how it will attach to the sleeping bag.
Women’s sleeping bags: Not only are women more sensitive to the cold than men, but they also sleep in different positions in some cases. Women’s sleeping bags are shorter in length, narrower at the shoulders and wider at the hips. They will also have more insulation.
Sleeping bag length: You’ll want a sleeping bag that’s as close to your height as possible to minimize weight and maximize insulation while still allowing you to lie comfortably in it.
Electronics bag: great idea! You can place your cell phone, camera or other items inside the sleeping bag to sleep with you to keep the battery charged during the cold nights.
Hood Cord: You will want the hood of your mummy sleeping bag to be as closed as possible. On very cold nights, you might just put your nose out to breathe.
Zipper pullers: A zipper that can be opened from the inside as well as from the outside is a good idea.
Water-Repellent: A long-lasting water-repellent coating helps prevent rain and condensation from penetrating your sleeping bag. You will need this performance.
Leg and foot openings: These are stupid and unnecessary, avoid them.
Sleeping bag tips
Before you get in, fill a water bottle with hot water and throw it into your sleeping bag. This will keep you warm and cozy when you get in.
A sleeping bag does not generate heat, it only retains your body heat. Warm up on a cold night to get your blood circulating before diving in.
Temporarily repair tears or holes with tape to control damage before they grow. After returning home, they can be completely repaired by patching or stitching.
Keep your sleeping bag away from sources of fire; sparks can easily create holes and the heat can melt them.