They were Avantis, by Durex. They used to sell at a box of five for between $14 and $21 depending where you shopped - a pay for quality thing, really. Can't get them any more though, according to the Condom Shop on Chapel St - Durex have gone for a different plastic under a new name (neither of which I can remember now) that's cheaper for them and means they can sell more in a box for a slightly lower price. I haven't tried them yet to see if I like them as much though.

-Kali.-