Pants and or slacks must be clean and pressed and may not include denim of any color, nylon or other similar material, or cargo style pants. Appropriate footwear and socks shall be worn. Athletic shoes, sneakers, sandals or hiker/training boots are not allowed. Likewise, athletic sock will not be worn with dress shoes."
To quote the great and wise Bryant Gumble:
His preoccupation with the Marshals' dress may indicate, perhaps, that Mr. Quinn is just a little light in the regulation loafers.