Razer is a gaming brand and as such, it markets its Moray headphones as in-ear noise-isolating "gaming" earphones. And while there really isn't anything different about them from other soft earbud-style headphones in their price class, they do indeed pair up quite nicely with the PSP, DS, and MP3 players.
Personally, I've always liked these style earphones. The typical hard earbud-style headphones that ship with the iPod and PSP simply don't fit my ears and these soft 'buds have always worked much better. Like other earphones of this ilk, the Morays come with three different size ear-buds (small, medium, and large) and one of them will most likely fit snugly--and comfortably--in your ear. The headphones also come with a nice little neoprene carrying case and a two-pronged adapter for airplane use.