Should I use personal water filter to drink water in the wild?

Familiarize yourself with the local weather conditions in advance. Prepare appropriate clothing according to the weather conditions; If you travel in cold weather, do the corresponding wind protection measures. Do not expose yourself to cold winds with a personal water filter. Warm hats, gloves, bibs, windbreakers, thick socks, windproof masks. Even goggles are all essential items for traveling in windy and cold weather. If too many exposed body organs are exposed, the greater the wind speed, the corresponding acceleration of body heat loss.

Outdoor activities in cold weather, keep the body dry, if wet, quickly change into dry clothes; Choose underwear that dries quickly and wicks away sweats. You should avoid cotton underwear. Cotton fabrics are very sweat-absorbent and are not easy to export, causing temperature loss; What’s more, you should regularly drink water that purified by personal water filter to replenishes the body.

Pay attention to the increase or decrease of clothing. Many people like to wear thick clothes when hiking, afraid that they will catch a cold on the road. As a result, they have not gone far, and are wet with sweat and are easily out of temperature;

8 guides on outdoors survival

1. Make sure of your physical condition. People with heart disease, respiratory diseases, hypertension, etc. are strictly prohibited from entering plateau areas and low-pressure areas to work
2. Before carrying out field geological work, it is necessary to train on safety production rules and regulations and post safety technical operating procedures. You should have the corresponding basic skills of protection, self-rescue and mutual rescue (first aid kits, food, drinking water, matches, etc.).
3. With communication equipment that can meet the actual needs, clarify the contact matters (GPS, satellite phone, etc.).
4. Bring personal protective equipment for field work (field work clothes, hiking boots, sun hats, etc.)
5. Carry a personal water filter that purifies the water source, do not take the river and other surface water directly, it needs to be purified or boiled before drinking.
6. Pay attention to listening to the weather forecast, before departing every day.  You should understand the weather conditions of the day; the travel route and road conditions; the topography of the operation area, the surface coverage, etc.
7. In valleys, ditches, low-lying areas or rainy season operations should do a good job in flood prevention and disaster relief. During thunderstorms, try to avoid ridges or open areas, cliffs and tall trees. When the rain and snow have just stopped, it is strictly forbidden to work and walk immediately on landslides, narrow mountain paths, cliffs, snow slopes, glacial slopes and other dangerous areas.
8. Entering dangerous areas to engage in field geological survey work should be led by experienced personnel and safety and security measures should be formulated. In any case, you can’t go out on your own.

How to find water and make fire in the wild?

1. Look for water

Field work must bring plenty of drinking water. If the body does not constantly replenish with water, it will soon be dehydrated. Once a water shortage is detected, it is imperative to minimize the dehydration of the body and then find water to replenish it immediately.

Find water in the desert. Where plants such as cacti and thorny shrubs grow in the desert, it is possible to find water; Digging down at the bends of dry rivers, or the lowest points of depressions between dunes, may find water; Camels are highly sensitive to water, and if you follow the path that camels take, you will be more likely to find a water source.

Looking for water in the forest. Go to the lowlands; Look for green vegetation and don’t drink water near wilted plants; Observe the activity of animals or birds to see if you can indicate directions; The bottom of the cliff generally seeps out water; Watch out for frogs.

2. Fire

It takes fire to boil water, fire to cook roasted food, and fire to keep warm in camping; Fire is also the signal for help and to drive away wild beasts. Make a fire in a place with little wind or leeward. If you make a fire in a flat area and the wind is strong, you can put up a windshield wall or dig a trench to make a fire in it. The place where the fire is made should not be too damp. If you can’t find a dry place, you can use wet wood or stone to build a platform high above the ground and build a fire on it.

How do we survice in the wild?

Carry enough high-calorie foods; Do not allow yourself to be overdrawn, prevent dehydration. Avoid excessive sweating and fatigue, food and hot drinks. Replenishing body calories at any time are also very useful ways to prevent temperature loss; Once the temperature loss occurs, it is necessary to go to the emergency department or burn department in time for emergency treatment.

Drinking water is an important thing when hiking outdoors, especially in the hot summer when mountaineering activities. The need to drink water is even greater and more important. Although it is rare to hear serious dehydration accidents in the mountains, it is easy to ignore the situation of mild dehydration. Insufficient drinking water will have an impact on physiology and psychology. So even if there is no feeling of thirst, it is important to replenish the right amount of water at the right time; Drinking a large amount of water in a short period of time will also have water poisoning.

Fuel for fire. The most common fuel in the wild is dry plants, with dead branches and hay being ideal. Dry bark, dried moss, deciduous leaves, dried fruits of coniferous pine.  And fallen fruit are good ignition materials. In areas without trees, natural fuels such as dried slime, oil shale, oily sand, dried animal feces and animal oil, discarded household waste, cotton, plastics and car tires can use as fuel.

There are also some water bladders with EVA and PVC. EVA non-toxic cold resistance is not resistant to high temperature slight odor; PVC material is older than the material. It has odor, is not resistant to high temperature, is not cold tolerant, and is mildly toxic.

The material of the gravity water filter backpacking

This directly determines whether our drinking water is safe or not. So whether it is a lower riba or a tall brand, food grade, odorless, clean, is the benchmark for evaluating the quality of a water bladder.

At present, the mainstream gravity water filter backpacking mostly uses TPU/PEVA/PE

TPU polyurethane. tPU non-toxic, odorless, hardy, cold resistant to high temperature and mild physical puncture resistance. TUP water bladder is cold and high temperature resistant, cold resistant up to minus 40 °C. It is not hard and brittle; High temperature resistance can boil water. That is, 100 ° C, will not deteriorate, can still use. Easy to fold and easy to store.

EVA and PEVA :

1, biodegradable: discarded or burned will not cause harm to the environment.

2, similar to the price of PVC: the price of EVA is more expensive than toxic PVC. But it is relatively cheaper than PVC without phthalates.

3, light weight: EVA density between 0.91 and 0.93, while PVC is 1.32.

4, no odor: EVA does not contain organic odors like ammonia or others.

5. No heavy metals: Complies with the relevant international toy regulations (EN-71 Part 3 and ASTM-F963).

6, no phthalates: suitable for children’s toys and will not produce plasticizer release danger.

7, high transparency, softness and toughness: the scope of application is very broad.

8. Super low temperature resistance (-70C): suitable for freezing environment.
9. Resistant to water, salt and other substances

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