The following article was sourced from a Wikipedia page at the following address: http://en.wikipedia.org/wiki/Sweatpants
Sweatpants are a casual variety of soft trousers intended for comfort or athletic purposes, although they are now worn in many different situations. In Britain, Australia, New Zealand, and South Africa they are known as tracksuit bottoms or jogging bottoms. In Australia, they are also commonly known as tracky daks.
Sweatpants are usually made from cotton or polyester, often of a heavy knit. They often have elastic in the waist, and may or may not have pockets. Sweatpants are traditionally ash gray in colour but are now available in most colours. They are usually quite "baggy" and loose, making them easy to put on and take off; moreover they have flexibility and comfort. In addition, this design traps less heat than most conventional, lightweight trousers, which may be a disadvantage in some conditions such as cold temperatures and an advantage in others such as body heat-increasing aerobic activities.
Once these practical pants were only worn for sporting events and at home. Now, they are available in many fashionable styles and are worn in a variety of public situations. Because of their comfort and fashion, they have become a popular choice of clothing. The sweatpant variations described below are made from many different materials and in many forms.
There are many variations on the sweatpant design that have evolved to define their own categories of athletic pants. These variations include fashion pants, windpants, tearaway pants, and muscle pants.
To read more about sweatpants, please click on the following link: http://en.wikipedia.org/wiki/Sweatpants