Tifosi Mast Interchangeable
Here's what other sites are saying:
A true performance sunglass is one that performs so well that you forget you're even wearing it. Tifosi makes true performance sunglasses. The Mast Sunglass uses a Grilamid TR-90 frame with adjustable temples for bombproof durability, ultra-light weight, and customizable fit. Hydrophilic nose and ear cushions become grippier when they get wet, so the Mast stays put when you sweat.
The Tifosi Mast sunglasses are like armour for your eyes, protecting them them from harsh rays, errant bugs and rocks with a lens for any adventure or light condition.