por | Jul 24, 2026
4 VENT HOLES WITH SLIDING SWITCH – In order to coordinate the balance of ventilation and protection, we have specially designed 4 vent holes that can be freely opened and closed. You can close these vent holes to avoid dust contamination of your retainers or...
por | Jul 24, 2026
4 VENT HOLES WITH SLIDING SWITCH – In order to coordinate the balance of ventilation and protection, we have specially designed 4 vent holes that can be freely opened and closed. You can close these vent holes to avoid dust contamination of your retainers or...
