1. HEAVY DUTY GAS MASK FOR SMOKE & CHEMICAL - Experience ultimate personal protection against environmental hazards with the elite ST-100X breathing mask. This kit features a replaceable P-D-1 40mm carbon-activated filter housed in heavy duty plastic for maximum security and durability. 2. MILITARY GRADE CONSTRUCTION - Designed to withstand brute force impacts and toxic environments, the ST-100X filtered mask will provide you the safety and security you need to escape unpredictable, dangerous conditions. Our top-quality protective gear is ready for any situation. 3. SUPERIOR BREATHABILITY - The ST-100X's dual intake valves provide superior breathability and support respiratory effort instead of inhibiting breathing. The intelligent ventilation structure creates cooling airflow, helping you stay collected and focused during high-intensity situations. 4. VERSATILE PROTECTION - Specifically designed to provide unparalleled safety while working with chemicals and various toxic substances, the ST-100X serves as the ideal choice for a range of applications, including chemical laboratory settings, inspection equipment handling, and environmental technology. 5. UNMATCHED COMFORT - Designed for a universal fit, the 5-point harness stretches cleanly over your head without snagging and quickly secures through the 5 pull tabs. Made from dense, sturdy, elasticized rubber, the straps retain their shape even in the hottest environments.