The toe strap is made from a special and solid Prussian knot design, showcasing the minimalist style of women's flip-flops. The entire surface of the insole is made of synthetic leather material, giving the flip-flops a more textured feel. The special double-layer design at the back adds a fashionable touch, provides better heel support, and enhances walking comfort. Outer material: synthetic leather (the insole and upper are made of high-quality synthetic leather, which not only makes the women's flip-flops sturdy, durable, and quick-drying, but also prevents foot skin from being damaged by friction, thus protecting the feet).