TPU membrane upper material is usually composed of three layers: the surface layer is PU layer, which is used to color and print patterns on the upper; the middle layer is TPU membrane, which is the main part of the fabric, which determines the main performance characteristics of the upper; The bottom layer is a TPU hot-melt adhesive film, which is mainly used as an adhesive to realize the bonding between the TPU upper material and the shoe. The TPU film upper material can be directly attached to the shoe body and press-molded by the excellent adhesive properties of the underlying TPU hot melt adhesive film without sewing process, so it is also called TPU seamless upper.

Due to the excellent performance of TPU film uppers and the processing method that does not require manual cutting, since 2009, the uppers of mid-to-high-end sports shoes have gradually used TPU film upper materials to replace PU microfiber leather and PU space leather. At present, the first-line sports shoe brands at home and abroad have used a large number of TPU films to make uppers, and the second-tier domestic sports shoe brands have also begun to use TPU film uppers.