1 Stretch material
Selected for expansion and contraction, restoration, texture, and quality. If it stretches too much, it will not be restored, it will be restored, but the elongation is insufficient, and even if it is just right, the texture is different and many prototypes have been made. The double structure of this material (nylon 88 / polyurethane 12) realizes the ideal. Sunwell's water-repellent easy care 4Way stretch nylon that expands and contracts not only on the left and right but also up and down is adopted, and it corresponds to life waterproofing.