Smith Guide's Choice - Sinqua Walls - Mending the Line
These sunglasses asre made for fishing, an activity that plays a central role in this movie.
The Smith Guide's Choice worn by Sinqua have a black or charcoal glossy frame, and we can't see exactly which lenses, but for fishing the Techlite Polarchromic Copper Mirror Lens would be a good choice.
Buy the Smith Guide's Choice on Amazon (where there are 36 different frame/lens combinations available) .
Smith also the Operator’s Choice model which is a very similar frame to Guide's Choice.
Sinqua Walls is an American actor known for appearing in Friday Night Lights, The Secret Life of the American Teenager, American Soul, and Clint Eastwood's biopic The 15:17 to Paris.
In the film Mending the Line, Sinqua Walls plays a Marine who is wounded in Afghanistan and returns to a VA hospital in Montana where he meets a Vietnam vet (played by Brian Cox) who teaches him fly fishing as a means to coming to terms with his physical and emotional trauma.
In the same film, Sinqua Walls also wears a pair of Oakley SI Ballistic frames in the war scenes.
Reference: Smith Guide's Choice, shiny black frame