It looks like Sinqua Walls wears Smith Guide's Choice sunglasses in Mending the Line (2023).
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.
