Navy Physical training uniform

The uniform consists of a gold short sleeved shirt and Navy blue shorts. The shirt is moisture wicking and odor resistant polyester with Navy in reflective lettering on back and front. 

 
The nylon moisture wicking and odor resistant Navy blue shorts come in six and eight inch lengths, providing standard appearance among different height Sailors. It also has reflective Navy lettering and side pockets with a hidden ID card pocket inside the waistband. As with the Army uniform, optional compression shorts may be worn under the PTU shorts provided they are black or navy blue in color.
Wear and Appearance of Navy Uniforms and Insignia consists of:

• T-shirt: Gold Navy-marked long-sleeve or short-sleeve T-shirt; small reflective NAVY lettering on front of shirt and larger reflective NAVY on back.
• Trunks: Navy Blue trunks with large reflective NAVY lettering on front left leg.
• Shoes: Approved, well-fitting, comfortable running shoes.

From Wikipedia