hexasecure filtration system, ergonomically designed, ultrasoft nosewire -leaves no mark after usage,)nylon earloops with maximum stretch, headband gives a better fit and provides additional support making,mask-wearing"  a painless experience, unique criss-cross outer fabric with hardener finish -breathability improves after every wash,inner fabric with antimicrobial finish & skin-friendly,color's available-black, navy blue, white, red, dark grey, pink, purple.