Costa Half Moon 580G Polarized Sunglasses You'll look like a maverick in Costa's Half Moon sunglasses, a West-Coast-inspired style that rides the mystique of epic ocean swells. With staright temples and double-cut textures, the sporty, large-fit Half Moon's integrated spring hinges provide outstanding function and comfort with beautiful aesthetics. Inset Hydrolite nose and temple pads prevent slippage for all-day, hardcore use.