I've owned several Silencer sunglasses since I first came across this name brand in 2004.  I have used them on two combat deployments and numerous rifle ranges.  My first pair deflected hot brass from a rifle that had been fired next to me, resulting in a small scuff mark.  Best of all, once you install a new pair of lenses they feel like a new set of sunglasses.  Although the price for a pair of Silencers has risen since 2004, the quality, customer service, and included accessories still remain.  Here a my thoughts on this pair of sunglasses.
Pros:
Inexpensive- Especially compared to Oakley's
Included Accessories- case/cleaning cloth, lens kit
Durability
Stylish- Easily transition from sports activity to general wear
Variety- Native offers a wide selection of colors to choose from
Polarized
Cons:
They do not accept prescriptions
Some may not like the low profile
The rubber pieces that secure the sunglasses to your head slip off in hot/humid climates.  I've lost several of these pieces.  If Native sold a replace kit I would buy it.  Native does offer an alternative model that is all plastic.