Many triathletes like a mask style swim goggle, but for some, it's just too bulky and non hydrodynamic. If you're a purist, Blueseventy's Nero Race Swim Goggle was designed for you. The goggles feature UV and AF polycarbonate lenses for clarity and protection. The lenses are low profile to reduce drag, and are molded to reduce flex and increase durability. A double band silicone strap allows for security and customized fit. The Blueseventy Nero Race Swim Goggles come in One size. They are available in four colors: Blackgold mirror, Whiteblue mirror, Blacksmoke, Blackyellow.