For the purpose of these Regulations, an article of clothing shall be defined as anything worn or carried by a player during play except the racket, and including, but not limited to, pullovers, shirts, shorts, skirts socks, shoes, headbands, towels, wristbands, bandages and medical supports.
In order to ensure attractive presentation of Badminton at tournaments organized or sanctioned by the BWF, all clothing worn by players shall be acceptable Badminton sports clothing. It is not acceptable to tape over or to pin on advertising or in any other way to modify such clothing to comply with advertising or other regulations.
Regulations regarding advertising apply only to clothing worn during play.
The exact regulations regarding advertising must be clearly indicated on the tournament prospectus or entry form and advised to entrants in all associated communications.
For Para-Badminton, shorts also include trousers and similar legwear.
(Sample picture above: Coach wearing shorts and sandals in the game.)
References: 2014/2015 BWF HANDBOOK II