The teeth were redesigned, the manufacturing process rewritten, and new machinery developed to attach the closure to garments. “The absence of the tape posed various production challenges,” Nishizaki says. “We had to develop new manufacturing equipment and a dedicated sewing machine for integration.” The result: a lighter, more flexible system that reduces material use and environmental impact compared with a standard Vislon zipper.
Early adopters are already experimenting. Descente Japan, known for technical sportswear, was among the first to prototype AiryString in 2022. The North Face has selected the system for use in its new Summit Series Advanced Mountain Kit. Smaller brands like Earthletica, an eco-conscious swim and performance label, have also tested it, describing the zipper as “soft, flexible, and almost silent.”
The effect is apparently tactile. Garments move more naturally, lie flatter against the body, and feel less mechanical. “We repeatedly conduct durability and strength tests by sewing AiryString and conventional zippers into various fabrics,” Nishizaki says. “In terms of usability, AiryString offers much smoother operability.” That translates to a softer, slicker glide—the satisfying pull that separates a well-made jacket from a cheap one.
Little Parts, Big Change
On the factory floor, the benefits add up, too. Traditional zippers consume extra fabric and dye and require multiple sewing passes. By removing the tape, YKK says it trims both material and labor. “It contributes to reducing work in customers’ sewing processes,” Nishizaki says. “It also reduces fiber use and water consumption in the dyeing process, lowering CO₂ emissions.”
The math adds up fast. YKK offers a 100 percent recycled-material version of AiryString and claims measurable cuts to greenhouse gas emissions and water usage. The impact is magnified by scale: The company operates in 71 countries and regions, and its trademark is registered in 177. When you make billions of zippers a year, these small efficiencies ripple globally.
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