The shape of the ski circle is similar to the swimming circle on the back cover. People can sit on it to slide down the snow slope and enjoy the fun of skiing. The ski ring is inflatable design, which releases the air inside when not in use, and is convenient to carry after being folded in half. You need to inflate when you use it, and you will feel soft and comfortable when you sit on it.

From the perspective of historical evolution, skiing can be divided into ancient skiing, modern skiing and modern skiing; From the conditions of skiing and the purpose of participation, it can be divided into practical skiing, competitive skiing and tourism (entertainment, fitness) skiing. Practical skiing is used in forestry, border defense, hunting, transportation and other fields, and has been replaced by mechanical equipment, gradually losing its application value in the past. Competitive skiing is to upgrade skiing to Huawei and use the functions of competition under specific environmental conditions to achieve the purpose of competition. Recreational fitness skiing is a popular skiing developed to meet the needs of modern people's life and culture.