01 / Method

The Vulcanization Process.

The characteristic of SPINGLE is the unique design of the wave / makiage sole, which envelops the upper.

Of course, aesthetically this looks pleasing, but this form — created through the Vulcanization Process — also gives a strong bond between sole and upper: a sole that does not peel off easily, and a shoe that does not lose its shape.

The Vulcanization Process is a manufacturing method by which a rubber sole, with sulfur added, is glued to the shoe body and placed in a kiln where heat and pressure are applied. It was invented by the American inventor Charles Goodyear more than 170 years ago, in 1839, and is the true basic sneaker manufacturing process.

02 / Setting

Gluing the upper, hanging the shoes.

Craftsmen manually glue the upper — the shoe body — to the sole, and set the sneakers on the hanging shelves of the kiln. At first glance, the sneakers look close to their finished form. But the rubber part is still soft.

03 / Toe Lasting

The effort to leave no margin of error, by the millimeter.

Lasting — pulling over — is the work of drawing the upper down onto the wooden last so that no wrinkles remain. When decorative materials are involved, making the left and right perfectly symmetrical is hard; even within the same hide, the leather can stretch slightly differently from one part to another.

If the widths disagree, or the heights are off by a millimeter, the shoes will simply look wrong. So the craftsman makes the effort — by hand, analog-style, every pair — to match the two sides to the same width, to the millimeter, and leave no room for error.

04 / Side Lasting

Ensuring the best appearance and ease of foot entry.

Here the task of lasting the sides is undertaken, with the front completed by a machine, and the inside and outside sides attached to fit the last — the foot shape model.

This affects the appearance of the shoes, so it is necessary to take care: depending on the amount of pulling, the height of the collar may change, which can make foot entry difficult.

05 / Sole Attaching

Adjusting each sole to match each shoe’s condition.

Here the finishing work of attaching the shoe sole is undertaken. In order to prevent the upper from peeling away due to gaps, the craftsman considers the type of upper material and selects glue to match.

Even with the same material, the degree of leather shrinkage differs from shoe to shoe, so fine adjustment is required. Even now, curving the wave / makiage sole up to the toe tip is still difficult.