I am looking to pick up some sunglass leashes for assorted model of Oakleys. Mostly for X-Metals, Blades, Square Wire 2.0s and Half Jacket 2.0s. I found this one company that offers almost a dozen different kinds, the name of the company is called Edge Eyewear. Not sure what kind to pick up and for what models. Anyone have any experience with them? I mean...I know a lot of us have some rather expensive glasses, and would hate it if they fell off our face and got all messed up. I usually just fold an arm of the glasses and place it hooked under my chin on my shirt. BUT....once in a while they fall out. ANY input would be greatly appreciated. THANKS! Oh...and they have a real thin "rope" version. I take it I would use these on real light frames like the SW 2.0s and the Blades. The Half Jackets are also light, but have rather thick arms. Thoughts??