Sports or activewear is a clothing, including footwear, worn for sports or physical exercise. Sport-specific clothing that is worn for most sports and physical exercise, for practical, comfort or safety reasons.
Sports are usually designed to be lightweight so as not to overload the wearer. The best athletic wear for some form of exercise, such as cycling, should not create drag or become too large.
Sports design must consider the needs of the thermal insulation of the wearer. In the summer, the sports situation should allow the user to keep it cool; in a situation which is cool, sport should help users to keep warm.
Sports should also be able to transfer sweat from the skin, using, for example, moisture transferring fabric. Spandex is a popular material used as a base layer to absorb sweat. For example, in activities such as skiing and mountain climbing is achieved by using layers: moisture transferring materials used on the skin, followed by a layer of insulation, and wind and water resistant shell garments.