Usually Lycra/Spandex, a synthetic elastic cloth.
Cycling bibs are used for another word for them is cycling shorts. They often are black made of lycra, and tight, fairly short and made with a flexible material. Some brands of cycling bibs shorts are Castelli Aero Race and Santini.
Most would wear a cycling Jersey together with cycling shorts.
Cycling shorts prevent the rubbing of your inner thighs together while peddling (known as the chamois) and to be aerodynamic. http://cycling-review.com/clothing/bike-shorts/wearing-cycling-shorts/
They're shorts specifically made for cycling (usually road cycling) that are made out of spandex for less wind resistance and a pad in the groin to make road seats rideable, otherwise i don't think the sport would exist without them ha.
Jean material
Popular styles of biker shorts for cycling enthusiasts include bib shorts, padded shorts, compression shorts, and baggy shorts. These styles offer different features and benefits to enhance comfort and performance during cycling.
Nylon or polyester
Nylon or polyester
Some of the best waterproof cycling shorts available on the market include the Gore Wear C5 Gore-Tex Active Trail Shorts, Showers Pass Transit Waterproof Cycling Shorts, and Pearl Izumi Men's Elite Escape AmFIB Cycling Shorts. These shorts are designed to keep you dry and comfortable during wet rides.
What you want for cycling is shorts/trousers with as little seams and as flat seams as possible between your body and the saddle. Bicycle shorts are made that way, and they are also padded - but any shorts that fits the bill of being flat and friendly to your skin will work.
No, you dont use underwear with padded cycling shorts lol! *still laughing* omg no. searouly? oh then no
There's a wide variety of sources out there for cycling shorts, so you should ensure that you're getting the best of the best. One of the stores with the best selection can be found at http://www.rei.com/search?cat=4500003_Cycle+Clothing&search=Cycling+Shorts