瘦腿原理：鞋底通过采用弧形设计，穿上鞋后达到能前后运动，通过弧度所处的角度不同，从而达到位伸肌肉达到瘦腿效果（达到瘦腿效果需长期正确使用）
Stovepipe principle: the soles through the use of curved design, put on the shoes to reach before and after the movement, through the arc at different angles, so as to reach the stovepipe muscle to achieve stovepipe effect (to achieve stovepipe effect to be long-term correct use)