I use these glasses when flexing of cobblestones. The glasses sitting very comfortable on the bridge of the nose and is thanks to the adjustable strap to adjust perfectly. Especially the scratch resistance of the glasses is a great advantage when flexing of stone. And until now, I still can not tell the scratches. The anti-fog coating is just in the additional use of a mouthguard great advantage. One shortcoming there yet. The tinted glasses may be a great thing when the sun but in dim and hazy weather, it is quite dark and unpleasant to the eye. But all in all, the spectacle is highly recommended,
