US Patent 9521883 Slide fastener

There is provided a slide fastener. Each of a pair of fastener element rows is a coil-shaped fastener element row made of synthetic resin. Each of fastener elements includes an engaging head section, a first leg section and a second leg section. The first and second leg sections protrude from the engaging head section and extend parallel to each other. The first leg section comes in contact with the corresponding fastener tape and the second leg section does not come in contact with the corresponding fastener tape. The first leg section is colored in a color different from those of the fastener tapes and the second leg section. The color of the first leg section is visible through a gap between the pair of fastener tapes.