1. Stretch material
We chose everything, such as stretch, restoration, texture, and quality. with close attention. We tried hundreds of challenges whenever facing these problems like If the fabric was too stretched, it did not restore, restored but lack stretch, or even if it looked right material, the texture was different The double structure of this material (nylon 88 and polyurethane 12) makes it ideal one. It has stretch-ability in 4 directions (4WAY) that stretches not only to the left and right but also up and down. It is water repellent and waterproof for daily life.