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In the hot summer days, perhaps we can enjoy the air- conditioning inside the house, but the people in the building site, farmland and those driving large-scale machines can not be so comfortable. In large tools, such as trucks, usually do not have air-conditioning. It can not ventilate between workers back and the seat backrest. When they rest, they often find heavy sweat. It can not only make clothes wet, but also cause cold. People hiking with backpacks and climbing enthusiasts, as well as the students, etc., all suffer from backpacks in the summer. So I designed this cooling pad, X-type bracket made of flexible materials, filter ventil
Ying Fangtian;Luo Shijian