Foster Grant Polarized Aviator R Sunglasses with Spring Hinges and Free Eyeglass Strap Aviator style sunglasses deep gun metal frame polarized lenses with free eyeglass strap Polarized Lenses,superior optical clarity and creates less distortion Spring Hinges and Metal Frame for strength, comfort and durability Premium-designed sport build frames with temple inserts and rubber nose pads 100 % UVA-UVB Protection