1.单向排气只出不进，避免袋内胀气撑破包装 2.高遮光高阻隔，锁住咖啡香气，大幅延长保鲜期 3.可带拉链重复密封，分次取用不易变质 4.款式材质任选，印刷质感高级，适配线下商超与电商售卖 5.挤压袋身可闻咖啡原香，提升顾客选购体验

Equipped with food-grade one-way degassing valve, it releases CO₂ from roasted coffee while blocking oxygen and moisture to avoid bag bulging and flavor loss. Made of high-barrier aluminum foil, available with resealable zippers in flat bottom, center seal and stand-up styles. Custom color printing and matte lamination for coffee beans and ground coffee long-term preservation.