The Eyres 717 Mistral is a low impact pair of floating polarized sunglasses, with water repellant lenses.  That has a built in strap and toggle to keep the sunglasses on your head.  There are vents in the top and the bottom of the lens.   

Featuring 100% floating components, water and fluid resistant hydrophobic lenses for distortion free vision particularly during water sports and high velocity activity including rock climbing and abseiling, cycling and motor cross

About Eyres

Established in 1989, Eyres Optics are an Australian based designer and manufacturer of eye protectors and sunglasses. Focusing on state of the art ingenuity in tooling and forging, Eyres have demonstrated their ability to produce eyewear to meet both the simplest and most demanding needs.

Eyres are world leaders in developing, constructing and distributing advanced eye protection systems for many applications. Eyres products are known to be lightweight, comfortable, flexible, durable and optical friendly.

Eyres safety glasses can be used for a wide range of safety applications and are designed to perform in the most unforgiving and hostile environments. Due to this, Eyres safety glasses are commonly used in industrial, mining, manufacturing, agricultural, health care, emergency services, military, law enforcement and sports industries.