Ray-ban Explorer 5 RB3845 004/57. Frame color: Gunmetal; Lens color: B-15 Brown; Frame material: Metal. Ray-Ban Explorer V sunglasses features a sleek metal frame with an irregular shape, perfect for those looking to make a statement. The gunmetal color adds to the edgy vibe of these shades, while the polarized B-15 brown lenses provide both style and sun protection.