IRB Regulations on shorts
- Law 4.4 (c) states that:
"A player must not wear any items containing buckles, clips, rings, hinges, zippers, screws, bolts or rigid material or projection."
- Law 4.4 (f) states that:
"A player must not wear shorts with padding sewn into them". 
Shorts should be comfortable, as tight shorts increase the chances of sustaining a serious injury. The longer and baggier shorts are, the easier it will be for opponents to pull an opponent back. The colour and style of shorts are determined by the players club.
Rugby shorts must be able to withstand punishment and should be thick enough to provide some protection while playing. Most have pockets and many have a drawstring to prevent them coming down when tackled. While the most popular material has been cotton, modern shorts can also be made from higher grade polyester with reinforced seams. The use of these shorts is increasing as they are lighter, more durable, more comfortable, and better retain their color compared to traditional cotton shorts.
- Tag rugby shorts are generally lighter due to the non-contact nature of the sport and have tags attached with velcro patches.
The use of hard plastic padding of any kind, including jock straps, is forbidden in most leagues. However, in the United States, the high-padding of American football has influenced some junior leagues to allow, or in some cases require, jock straps.
Manufacturers of rugby shorts
Canterbury of New Zealand is the most popular producer of rugby kit. Kooga are a very popular supplier, particularly to rugby league teams. Paladin Sports is also a very popular manufacturer for both Union & League, as is Triple Play from Australia.
- "Laws Of The Game, Law 4 Players' Clothing" (PDF). International Rugby Board. Archived from the original (PDF) on 2010-03-08. Retrieved 2010-05-27.
- "Rugby union equipment: shorts". BBC Sport. 2005-09-02. Retrieved 2010-05-27.
- Guthrie, Patrick; Brown, Mathew; Growden, Greg (2007). Rugby for Dummies. John Wiley & sons Canada Ltd. ISBN 9780470153277. Retrieved 2010-05-27.
- "Rugby Player's Guide". rugbyrugby.com. Archived from the original on 2010-07-23. Retrieved 2010-05-27.
- "Performance Rugby Shorts". rugbyrugby.com. Archived from the original on 2010-04-03. Retrieved 2010-05-28.
- "Budlight Tag". irishrugby.ie. Archived from the original on 2010-07-27. Retrieved 2010-05-27.