The "Summer White Service" uniform (formerly known as Tropical White Long and nicknamed the "milkman" and "Good Humor" uniform) consists of a short-sleeved, open-collared white button-up shirt, white trousers and belt, and white dress shoes. Authorized headwear is the combination cap. Officers wear shoulder boards with this uniform, while chiefs wear metal collar insignia. The women's shirt for all ranks has shoulder straps, but carry nothing except for shoulder boards worn by officers. Like Service Khakis, Summer Whites are available in several materials (poly/cotton and Certified Navy Twill). When assigned as the Uniform of the Day, a Plan of the Day/Plan of the week will state "Summer White." Either the All-Weather Coat, Blue jacket, or Peacoat may be worn with this uniform. While once authorized for junior enlisted, it is now restricted to officers and chiefs. Members E-6 and below previously wore a short-sleeved Summer White uniform with rate insignia on the left sleeve, but the uniform was discontinued by the Navy in December 2010.