The tyrants are a great pair of sunglasses.  I have two pair.  The reason i'm sold on them is because of they way they fit my face.  I have a small head and finding the right pair is always difficult.  So when i find a pair i tend to stick with them.  I use them when i race mountain bikes and  when i'm out wake boarding with my family.  The do a really good job of venting so my lenses don't fog up. Best of all they are pretty cheap.  Last summer i lost a pair to the lake.  Thankfully, they aren't very expensive.