Are hundreds of leather shoes Goodyear or sewn inside?

The technological level of men's leather shoes, from bottom to top, is gluing, inner sewing, Goodyear parallel sewing, manual parallel sewing and Norwegian sewing. The characteristics of the inner sewing technology are: the inner sewing technology is relatively light, the vamp is turned inward, and the sole can be made thinner without using accessories such as welting, and it can be cut close to the vamp to achieve a more slender and light effect. The inner sewing process is to connect the insole with the outsole and sew it up. Internal sewing is one of the traditional techniques, which is less difficult to make than other sewing methods, so it is regarded as higher than ordinary advanced technology.

Goodyear's exact name should be "Goodyear Shoe Sewing Technology". The soles and uppers of leather shoes are made of two materials. In the end, we must find a solution to the problem. There are three fixing methods: one is to directly stick the sole to the upper, which is called "sticking shoes". The second is to sew the sole directly on the inside of the vamp with a needle and thread, which is called "inner sewing shoes". Thirdly, a welt is specially used and double needles are used. One thread sews the sole to the welt, and the second thread sews the vamp to the welt, and the welt becomes a transit point for the sole and vamp. This kind of shoes is called Goodyear welt shoes. The biggest difference between these three kinds of shoes is that when the uppers are still well preserved and the soles are seriously worn, it is Goodyear's best shoes to remove the soles and replace them with new ones. Because it only needs to remove the line connecting the sole and the welt, but does not need to remove the line connecting the upper and the welt, this can ensure that the sole is removed, but it does not affect the modeling proportion of the whole shoe upper at all.