However, modern rugby shirts often have a very small collar, or none at all, so as to provide less material for a potential tackler to latch onto (even though such an action is illegal during a game).
A traditional design of rugby shirt consists of five or six horizontal stripes or "hoops" in alternating colours.
In addition, the increasing use of skin-tight shirts further enhances this effect, as there is no loose material for a tackler to get a grip of.
Other benefits of man-made fibre over cotton is that it absorbs less water and mud, and it can accentuate the muscular physique of players.
The gaining popularity of rugby sevens has made more of a demand for lighter, more breathable jerseys as well.