| Specifications︰ | EVA foam material is it make water articles to use in a large amount , for instance lifesaving undershirt , swimming board ,etc.. Among them life save the material of adopting EVA to foam within undershirts , through compressing the three-dimensional shaping of 3D, its there is the about for 4 centimetre thickness (produce at home hair material not thin of 5-6 slices,the about 5-7 centimetre thick), the life vest produced according to the standard specification , all have its buoyancy standards, it is 7 to generally grow up. 5 kilogram per one hour, that is to say adult put on it soak one hour buoyancy their may up to 7 still in sea. 5 kilograms. Children 5 kilogram per one hour, could guarantee chest the above pays surface of water in this way. |
| Advantages︰ | Put on a lifesaving undershirt, can let the fishing people who can not swim safer . " safety first " angles eternal themes of friends, the life vest of the buoyancy is particularly important to satisfy the criteria. |
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