1. maintain the proper tightness. Wear goggles to note that goggles should not be too tight, otherwise it causes oxygen to the brain or eyes are not uncomfortable.
2. make the goggles don't fog. We often worry about goggles fogging, it can be used for a convenient way to solve this problem, such as in goggles, apply anti-fogging agent (which can be bought at the store) and spit some saliva coated glasses around, inside and outside, and then wash it (careful not to hand).
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