Cycling shorts

Cycling shorts are short, skin-tight legwear designed to improve comfort and efficiency while cycling.

reduce wind resistance, increasing aerodynamic efficiency
protect the skin against the repetitive friction of the legs against the bicycle seat or frame
provide support to the male anatomy analogously to a jock strap
draw sweat away from the skin to prevent chafing and rashes, and to cool the rider down through the process of evaporation
compress the legs, which can help combat muscular fatigue
reduce the weight of a riders clothing (compared to wearing denim, gym shorts or baggy shorts).

Historically, cycling shorts were made of knit black wool, which hides oil and grease stains, with a chamois leather patch inside the shorts in the crotch area, which reduces chafing from the bicycle saddle. Modern cycling shorts are often made of spandex (Lycra) with a synthetic chamois lining and are produced in a variety of shapes and styles to suit the needs of different riders. For example, the patterns used for the chamois on women's cycling shorts tend to be quite different from those used for men's. The hem of each leg is usually lined with elastic and/or elastic gel that clings to the skin, keeping it in a fixed position.

Cycling shorts are designed to be worn alone with no undergarments, or as an undergarment. Shorts made from several panels (or cuts of fabric) fit better, but cost more. Short-legged elastic tights commonly worn as street wear, under school uniform skirts or for gymnastics and ballet practice, are sometimes also referred to as bike shorts, but they are typically simpler and lighter garments than those worn by cyclists and generally lack the chamois or faux-chamois lining.