Choosing a sleeping bag your first night of a long-awaited trip in the mountains. Hardly your remaining forces. With last efforts open can of beans, lit the gas and Primus charge exhausted body with much needed calories. With a sense of gratitude poking into the tent and insert blissfully in the sleeping bag. Finally rest. Tomorrow’s long transition no longer seems so impossible … Until you do not wake up in the wee hours of the day with eerie chattering teeth, stiff legs and body completely frozen. If frozen wake up at midnight or your so hot that it you can fall asleep, it does not mean that you have not purchased a good sleeping bag. Rather use an inappropriate heard. Since the market has literally hundreds of models, if not thousands, what happened to you happens more often than you might think.
While it is always important to predict in advance how you will use your equipment, sleeping bags are still something with a universal purpose. However, if you foresee serious winter camping at very low temperatures or climbing, it is better to invest in a sack, which is intended to minus 20 or 30 degree temperatures, in addition to a lighter bag for trisezonna use. Some bags have a removable lining, where you get double heard of cold weather and can choose one of two parts at higher temperatures. Usually trisezonnite bags are provided to about minus 5 degrees, which is suitable for warm weather and to some extent cool spring and autumn nights. It must be remembered that there are no universal standards regarding temperature tolerance of bags and also are important and individual differences. (See temperature tolerance and mystery of tolerance from the menu). While sleeping next to you partner may feel completely comfortable in their summer minus 5 degrees bag in a cool night, you may be frozen in the same bag. When you buy a sleeping bag, safe rule is to think of the coldest conditions that will use it, then lower the still 5-10 degrees. Remember that it is very difficult to warm up in poorly insulated bag than to ventilate in a bag designed for low temperatures. Heard calculated minus 20 degrees is usually appropriate because it will protect you in an unexpected cold night, and if necessary you can open his zipper ventilation.
Anatomy of a down sleeping bag (see PimaSleepingBags). Fig. 1 When you buy a sleeping bag no matter what, you should check a few basic things. Start hood. Hood. Most sleeping bags have a hood that can be cinched tightly around her face in cold weather. Up to 50% of your body heat can be lost through the head so that a good hood can significantly increase the quality of your sleeping bag. Log into the bag and pull up zippers above him. Can you still breathe with cinched hood? Can you turn or roll without choking? The hood should have a little more filling than the rest of the bag and, when installed, should leave enough space for a hat. Collar. The sack you must have a collar at the base of the hood that can clamp tightly around your neck. This part is designed to prevent heat loss around the neck and shoulders. Rectangular summer bags may be without a collar, but collars are an important part of winter bags. The collar must be sufficiently fluffy to fill the empty space between the neck and shoulders, but not so bulky that it feel like something tight around the neck. Compartment legs. Many sleeping bags are specially shaped in its lower part for the convenience of the legs. In some Alpine models provided extra space for shoes or water bottles. Zippers and seams. Look zippers and seams. Teeth of zippers must be sufficiently large so as not to pinch the fabric. Check if the fabric is strong enough strength around the seams. The stitches should be tiny and tight. Dissolve the bag and inspect its overall structure and finishing on it to determine its quality. All duvet bags must have a so-called “warm” seam. This means that the top fabric should be sewn directly to the internal and need to connect partitions that creates cameras.
The cameras should overlap so that it can not in between losing temperature (see. Figure 2). Fig. 2 Joining two sacks. Sometimes it is convenient to be joined by his two sacks zippers to get double sack. Many manufacturers use standard zippers where such an operation is possible. In such a combination may be used bags with different temperature tolerance. In cold weather put a thick bag on top. Remember that two coupled sack provide less heat than individually, as it gets over a gap, and the possibility of movements in which the heated air from the body comes out. If stuffed inside two people, you will quite warm. If you have heard that you can combine in such a way with his new purchase, check the site before purchase their compatibility. Boots zipper. Most have heard insulating sleeve or collar along the zipper on the inside to prevent heat loss. This sleeve must be stitched only to the lining, as its seam throughout the bag makes holes through which loses heat. Bags for low temperatures have two such muff, one for each half of the zipper.
If there is only one teat, it must be stitched to the lining of the upper half of the zipper so that it falls down when sleeping. Very narrow sleeves can catch in the zipper, so check their behavior before purchasing. Pockets. Some bags are equipped with pockets, but they can create more headaches than help. You should thoroughly think if you want in your dream can end up on your glasses or car keys. If you still holding pockets, pre-insert them some things to check their location and suitability. Warranty. Ask about the warranty period. What is included and for how long? Some manufacturers (eg. USA) offer a lifetime warranty on material and workmanship, while others guarantee only against “defects” in material and workmanship for the specified period. Temperature tolerance label on your sleeping bag indicates that it is designed for temperatures up to minus 30 degrees Celsius. Why then shiver all night when the temperature has not fallen more than minus 10 degrees? Welcome to the esoteric, mysterious and downright fascinating world of temperature tolerances sleeping bags. No other topic that causes more cynical laughter among mountaineers. Naturally, you expect that when you purchase a sleeping bag, which has a tolerance of up to minus 30 degrees, it can keep you warm at this temperature. Ultimately, you have certain expectations and mileage in the life of a new tire that cost much less (and possibly perform much more vital function) from a cocoon stuffed with fibers or goose down. However, despite whether in the woods or on top of a glacier, a 30 degree bag can make you freeze in far higher than that declared by the manufacturer temperature.