The Oakley Sunder is an all-in-one package for the ultimate eyeglass. It all starts with the dual frame materials. The O-Matter frame front is is both durable and lightweight. It is complimented perfectly by the C5 alloy temples that feature Unobtanium grip on the temple tips. Spring hinges make for a flexible and comfortable fit while the Trubridge techology helps to maximize fit options. With Trubridge technology, you get 4 sets of interchangeable nose pieces so these glasses fit you perfectly.