JHopThe cost per mask of the ones you linked to on amazon is about $1.10. These cost about $1.30. For the extra 20 cents you get the peace of mind that these are real. There are fakes of these SNP animal masks floating around, and there have been more and more popping up on amazon lately. I'd pay an extra .20 per mask to know I'm getting the real deal.
The price isn't worth going through MD on this one for us :(