So much of the base. It is worth noting that in the market are also helmets with additional equipme

Some of them do not recognize. They argue that helmets run only molluscs. A true skier wears a cap with a tassel. This is of course nonsense - ski helmets become popular for a reason.
The answer to this question is simple: for security reasons. Research conducted by American scientists (yes, I know it is quite hackneyed concept, but well ...) show that helmets on their heads reduce the damage associated with skiing as much as half (comparison refers to the years 1995 and 2009).
The type of hardshell helmet outer shell is made of carbon or special polymers. Inside is a special foam EPS. These helmets are relatively heavy, but have great ventilation.
While the choice of the type of the helmet is a matter of preference, where the size is different. Of how well the helmet fits to the shape and size of the head depends on its functionality (understood as security in case of an accident and convenience in any other situation).
Generally, ski helmet size is described in centimeters. In some cases, the numbering is given literal, as in T-shirts (S, M, L, XL). Number is the circumference of the helmet. To all was well matched, should be higher by about 2 cm from the circumference of the head. So if the perimeter is 54 cm, the helmet should be about 56 cm.
This is not the end. Even if it is in the circuit, the shell may have the shape of the proper comfortable use of the helmet. To be convinced jl of this, just put it on his head. It should not fall off when someone shakes his head, but should not constrict. Note: It is good to come a few minutes in the helmet to see what happens when he is on his head.
So much of the base. It is worth noting that in the market are also helmets with additional equipment. An example might be a hem adjustment, which allows you to adjust the size to the size of the head. Another jl addition are the earmuffs.
Although the helmet is not such a piece of equipment ski, which would be subject to violent unowocześnieniom, but this does not mean that buys him for a lifetime. There are situations where a helmet must be replaced.
The second case is an accident. If someone has hit something helmet should consider buying a new one. The equipment is designed in fact to withstand a single blow. Once they happen, in the structure of the helmet appear jl microcracks. The second stroke may be on the helmet - it just falls apart.
Half shell helmet is lighter. Ears are protected by soft ear pads, the rest is made of hard plastic. These helmets are just as safe as the full shell, but they look better. Therefore choose them especially ladies.
For maximum protection, full face helmet. You could say it looks like a motorcycle helmet. The front has a special element that protects the jaw. Has a serious drawback: it is uncomfortable. Hence, is also used relatively rarely. jl
Do not forget to discharge air from the helmet. This is important: jl the skier does not have a cap on his head, the helmet must provide thermal protection. At the same time, however, during exercise the body sweats and gives off heat. Hence the need for ventilation.
Full ventilation is the most basic of ways. Involves placing the slots or holes in the casing of the helmet. In this way, the air from the inside jl to the outside air. Disadvantage: lack of regulation.
Certain helmets have a so-called active ventilation. jl The difference: regulation not only allows you to open and close the air outlet, but also adjust the amount of which escapes to the outside. In these countries, the helmet is compulsory:
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