Everyone I know swear by these glasses and how great they are. I was holding out for awhile but after seeing and hearing about them all the time I picked up a pair. They have lived up to the hype and more. I use them for road biking and will use them for mountain biking, ice climbing and pretty much anything outdoors. They fit really well, stay on my face and head with great grippers instead of tension (no headaches). Changing the lenses are a snap, literally.