As soon as I put these sunglasses on my face, I knew they were gonna fit good. The texture and material of the frame really gripped well on my nose and by my ears even with my mountain bike helmet on. However, I do not get to use them very long. During my first race, I took them off of my face and hung them from the chest strap of my hydration pack for the first big climb to keep them from fogging, even though I applied a film of defogger. They slid out of my pack strap and hit the ground mid climb with hundreds of other riders behind me. I did not pick them up. I just kept going. But I have to say they did fit really well and the lens and frame were almost nonexistent as far as field of vision and clarity. I will be more careful with my next pair. Which brings me to another point, I don’t mind buying another pair because the price is right. it’s not like I can afford another arm or a leg because I already lost one arm in combat ha ha.