FRAME FEATURES: BB2061U Universal Fit eyeglass frames feature a square, dark tortoise bio frame with metal front rivets. UNIVERSAL FIT: Frames with a "Universal Fit" have a narrower bridge and longer, more curved nosepads to increase the grip on the nose with a reduced curved shape that reduces the space between the frame and your cheekbones. PRESCRIPTION READY EYEGLASS FRAMES: Brooks Brothers eyeglass frames feature lenses that need to be replaced with prescription lenses so you can enjoy clear vision.