I've never heard of this brand. Mates? I know about Durex Avanti, Trojan Supra (spermicidally lubricated, yuck), and Reality (female condom), all of which are made of polyurethane. There is another brand that you can get in Canada, Natural Sensation Unique, which are made of a super thin "synthetic resin" whatever that is.
Where does one find Mates, and what are they made of?