Costa Del Mar Costa Hammerhead 400 Polarized Sunglasses -
If you've got the guts you can swim with them, but we suggest you just kick back and relax while wearing them. Costa's Hammerhead 400 Polarized Sunglasses. Designed to deliver a great look and maximum coverage, the full-wrap Hammerhead Polarized Sunglasses feature TR-90 nylon frames with stainless steel spring hinges for comfort and durability. The Hammerhead 400 Sunglasses are available in two different lens types, LightWAVE glass or CR-39 scratch resistant plastic. Both lens materials are 100% polarized, 100% UV protected and offers heightened clarity, contrast and definition. Manufacturer's lifetime warranty.
LightWAVE glass lenses are 20% thinner and 22% lighter than typical glass lenses but they still exceed federal standards for impact-resistance.
CR-39 scratch-resistant lenses are fully functional, lightweight alternative to glass. This lens type offers all the same advantages of the LightWAVE glass but in a more affordable material.
About your Costa lenses:
Masseys Outfitters Guide to Buying Sunglasses If you have the cojones, you can swim with them. (The sharks, that is.) If you just want kick-ass style and max coverage, wear these. Built around stainless steel spring hinges, these full-wrap frames come in any number of toothy colors. Go ahead, jump in.