The Pivot is a casual design based on Magpuls Explorer model" merging high performance with casual style in a fit that suits small to medium faces. Its lightweight frame" low profile temples" and impact-resistant lens and frame combination are casual enough for everyday use. The Pivot's frames are constructed from TR90NZZ" the strongest thermoplastic material available for eyewear and" combined with its impact-resistant lenses" makes them some of the most durable" flexible" and lightweight sunglasses available. Their oleophobic polycarbonate lenses shed liquid and won't be degraded by water" sweat" or chemicals. The over molded anti-slip rubber nose and temple pads prevent slippage" no matter what activity you're engaged in.