These adjustable ear loops effectively reduce the pain and pressure that sometimes comes with wearing masks with ear loops. The flat toggle allows the wearer to adjust until the mask is perfectly comfortable and fitted to their face. The flat elastic cord is durable with excellent resilience - it will restore to it's original length without deformation or signs of wear. You can easily slide the toggle over the cord and adjust it as needed. Aside from face masks, this cord can also be used for earmuffs, earflaps, and respirator mouth-muffle masks.