Replaceable KN95 gasket (material delamination and characteristics) saves materials, reduces losses, is environmentally friendly and has low use cost. External separation design of mouth and nose (high ergonomic fit/smooth breathing in 3D three-dimensional space), more airtight and safer; High color value (multi-color bright metal buckle), fashionable and versatile, trendy; Baby nipple is made of the same material, soft and skin-friendly, not irritating, comfortable to wear, high temperature/UVC ultraviolet disinfection, no deformation; The length of the ear band can be adjusted to suit more groups, without irritating the ears or leaving marks.