Also, from the site:
How to use BGE PMs:
1. THE BUYER USES THIS PRODUCT AT HIS OWN RISK.
2. DO NOT use this mask for protection if munitions another then bbs cal. 6 mm weight 0.12 - 0.28 g and velocity above 150 m/s is used. 2. Minimum safe firing range is 5 meters.3. DO NOT use this mask in hardball-type games when metallic munitions is used.
4. KEEP THIS PRODUCT AWAY from water and harmful substances. DO NOT keep it wet more then 2 hours.
5. DO NOT warm it up above 40C (70F)
6. DO NOT shoot in mask from AEGs above 150 fps tuning.