High Quality， Polycarbonate lens withstand high impact<br />Elastic belt strap made of nylon fiber， 35mm width and about 40cm in max length<br />Frame is made by bi-raw material， UV-400 protection<br />The interior frame is seated with soft foam for comfort wearing<br />Perfect to use them when you are stepping on your skis or snowboard， skiing， skating， climbing， riding on your motorcycle/mountain bike， skydiving， bungee jumping， playing shooting games， doing an experiment in a lab， working in a construction site or having a snowball fight. Get rid of the fear of wind， dust， cold air， snow， sunshine and harmful lights.