Three-dimensional rubber patches. The Velcro patch on the back allows for attaching it to Velcro surfaces which can be found on many jackets or backpacks etc. Partially with glow-in-the-dark effect, where the material is charged by daylight or artificial light and consequently glows for an extended period of time. Unlike with traditional textile patches, there are no frayed edges or dirty fabrics. The rubber patches are easily washable.?