New NGC holders waterproof and airproof? 0

[NUMISGA]

Hello,

As far i know, the new holders are airproof and waterproof, right?
 

So there is no need to put them in an additional ..... "plastic bag" like the old ones?

Anyone ever tested a holder?

 

Thanks & Best

[LISA B]

Hello,

No, they are not air tight or waterproof.

Thank you,

Lisa