There are four components of the sole: the insole is the part where the foot is in contact when you wear the shoe. The outsole is on the sole’s bottom exterior, which touches the ground as you move. A welt is a strip of leather that forms the perimeter of the outsole mainly found in better-constructed shoes. It helps attach the upper to the outsole. The last is the one that gives the shoe its shape, and it is a dimensional model of a foot.
Goodyear welt is a strip of rubber, leather or plastic running along the perimeter of the pouter part of a shoe sole. The Goodyear welt construction is the process of stitching a welt to the upper part of the shoe with a strap running around the perimeter. The process is called Goodyear construction after the person who invented it in 1869.
There are four shoe construction methods, they are Cementing, Blake stitching, Strom welting and Goodyear welting. Each of them has its pros and cons.