Silicone oven mitts look a lot like they were designed after looking at a killer whale's profile, but they work! Don't wimp out on price. Buy the name brand and they will be worth the price.
I like the kind that have the nubs because I think they grip things better. There's a little more traction.
Heat doesn't "seep" into them like it does with other potholders or oven mitts. You can hold a hot pan out of the oven for a good while before your hands even start getting warm. They don't "breathe," so prolonged use will make your hands sweaty, but that's about the only drawback. They really do what they say they'll do.