Ray-Ban RB4187 6592T3-54 Chris Transparent Blue / Grey Gradient Polarised Lenses Ray-Ban Chris sunglasses are a stylish new addition to the Highstreet collection. These unisex sunglasses are designed with unique style cues taken from the Erika style, but spun into a slightly more masculine shape with square lenses and a less circular frame shape. Chris RB4187 sunglasses have been crafted with a gummy and rubberized frame finish, giving these trend setting sunglasses an exclusive textured feel. The Ray-Ban Chris epitomizes modern day fashion packed into a lightweight, comfortable design. Choose Chris in traditional black or tortoise frames or some bolder frame colors such as blue, green and red that will ensure you don't go unnoticed.Filter Category 3: General purpose sunglasses. High protection against sunglare. Good UV protection. Not suitable for driving in twilight or at night. Sunglasses and Fashion Spectacles are: - Not for direct observation of the sun. Not for protection against artificial light sources, e.g. solaria. Not for use as eye protection against mechanical impact hazards.