Shift Split MAG^™ 139mm Shield Sunglasses

Whether training on the mountain bike or on the running trails, I use clear lenses because I'm generally under the trees. I intended to use the clear lenses that came with the Shift Split MAG, but I decided to give the ChromaPop Photochromic Clear To Gray a try. They truly went clear in the deep woods and provided nice sun blocking in the clearings. They are a big improvement from my old clear glasses!

Pretty happy with these over all so far, comfort is great, weight is light, they didn’t move around at all, in direct comparison to the mag attack Mtb I think I will choose these for bike rides nearly every time now. The brown opal color confused me indoors it looks nearly see through and then in direct light it’s fully mirrored, interesting tech. Would love to see a metal hinge on this type of product, still the same mag release tech but with a metal hinge to tighten things up and bit and maybe even like a mag release in the event of a crash so an arm could pop off rather break the plastic or bend the metal.

The biggest problem with these, same as some other reviewers have mentioned is that the fit of the glasses are loose and floppy feeling. I am female and just thought my head wasn’t wide enough to accommodate these glasses. However the other reviews are from men saying the same thing. I will try to find a way to Jimmy them so they are tighter on my head and don’t fall down my face.

I will reiterate what has been alluded to with other comments here. I am a big dude with a relatively big face and somehow these glasses feel loose and floppy. They look great and have a high-quality lens, but the glasses just aren't secure on my face. They bounce around on the mountain bike and feel like the wind will take them off my face if I were to look back on the road bike. The arms are loose on my temples and the nose piece does not grip so I am constantly pushing them back up on my face. I have always been a fan of Smith products, but these seem to miss the mark.

These sunglasses do not curve as much as the Reverb or other models of Smith sunglasses, allowing more air from the sides and bottom of the sunglasses to pass over my eyes. Since I wear corrective lenses this style does not work for me; I need a more curved design that does not allow for as large of gaps at the bottom and sides of the sunglasses. I used them for several long gravel rides and they tended to stay on my face relatively well considering how far away the bottom of the glasses hover from my face, but sweat from my helmet would often run down the front of them. Lastly, the durability and scratch-resistance of the black gold mirror lens was lacking and I found several spots on the glasses where the chrome finish has worn off. The Mag arms for switching from the clear lens to the sunglass lens are very nice and the quality of the glasses is great. There are many other styles I've had success with from Smith but these ones aren't for me.